§1State listing — Mountain West
Montana
a regional flora of 56 counties
- State code
- MT · FIPS 30
- Taxa recorded
- 3,215
- Of which native
- 2,720
- Introduced
- 465
§2Counties
Drill down to a county
- Beaverhead 30001755 taxa Open ↗
- Big Horn 30003565 taxa Open ↗
- Blaine 30005333 taxa Open ↗
- Broadwater 30007359 taxa Open ↗
- Carbon 30009749 taxa Open ↗
- Carter 30011454 taxa Open ↗
- Cascade 30013768 taxa Open ↗
- Chouteau 30015423 taxa Open ↗
- Custer 30017458 taxa Open ↗
- Daniels 30019384 taxa Open ↗
- Dawson 30021420 taxa Open ↗
- Deer Lodge 30023219 taxa Open ↗
- Fallon 30025328 taxa Open ↗
- Fergus 30027625 taxa Open ↗
- Flathead 30029922 taxa Open ↗
- Gallatin 300311,362 taxa Open ↗
- Garfield 30033321 taxa Open ↗
- Glacier 30035695 taxa Open ↗
- Golden Valley 30037724 taxa Open ↗
- Granite 30039378 taxa Open ↗
- Hill 30041347 taxa Open ↗
- Jefferson 30043452 taxa Open ↗
- Judith Basin 30045425 taxa Open ↗
- Lake 30047601 taxa Open ↗
- Lewis and Clark 30049724 taxa Open ↗
- Liberty 30051159 taxa Open ↗
- Lincoln 30053466 taxa Open ↗
- Madison 30057785 taxa Open ↗
- McCone 30055366 taxa Open ↗
- Meagher 30059489 taxa Open ↗
- Mineral 30061311 taxa Open ↗
- Missoula 30063898 taxa Open ↗
- Musselshell 30065325 taxa Open ↗
- Park 300671,988 taxa Open ↗
- Petroleum 30069356 taxa Open ↗
- Phillips 300711,008 taxa Open ↗
- Pondera 30073252 taxa Open ↗
- Powder River 30075431 taxa Open ↗
- Powell 30077667 taxa Open ↗
- Prairie 30079286 taxa Open ↗
- Ravalli 30081587 taxa Open ↗
- Richland 30083350 taxa Open ↗
- Roosevelt 30085358 taxa Open ↗
- Rosebud 30087502 taxa Open ↗
- Sanders 30089512 taxa Open ↗
- Sheridan 30091463 taxa Open ↗
- Silver Bow 30093345 taxa Open ↗
- Stillwater 30095765 taxa Open ↗
- Sweet Grass 30097472 taxa Open ↗
- Teton 300991,702 taxa Open ↗
- Toole 30101252 taxa Open ↗
- Treasure 30103254 taxa Open ↗
- Valley 30105843 taxa Open ↗
- Wheatland 30107308 taxa Open ↗
- Wibaux 30109369 taxa Open ↗
- Yellowstone 30111531 taxa Open ↗
§3Catalogue
All taxa recorded in Montana
Filter & sort
Showing 3,215 of 3,215.
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Abies grandis (Douglas ex D. Don) Lindl. Native ABGRgrand fir · Pinaceae 3 counties -
Abies lasiocarpa (Hook.) Nutt. Native ABLAsubalpine fir · Pinaceae 7 counties - Abies lasiocarpa (Hook.) Nutt. var. lasiocarpa Native ABLALsubalpine fir · Pinaceae 7 counties
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Abronia fragrans Nutt. ex Hook. Native ABFR2snowball sand verbena · Nyctaginaceae 5 counties -
Abutilon theophrasti Medik. Introduced ABTHvelvetleaf · Malvaceae 24 counties -
Acer glabrum Torr. Native ACGLRocky Mountain maple · Aceraceae 25 counties - Acer glabrum Torr. var. glabrum Native ACGLG2Rocky Mountain maple · Aceraceae 2 counties
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Acer grandidentatum Nutt. Native ACGR3bigtooth maple · Aceraceae 1 county -
Acer negundo L. Native ACNE2boxelder · Aceraceae 26 counties - Acer negundo L. var. interius (Britton) Sarg. Native ACNEI2boxelder · Aceraceae 3 counties
- Acer negundo L. var. violaceum (G. Kirchn.) H. Jaeger Native ACNEVboxelder · Aceraceae 1 county
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Acer platanoides L. Introduced ACPLNorway maple · Aceraceae 7 counties -
Achillea millefolium L. Both ACMI2common yarrow · Asteraceae 55 counties - Achillea millefolium L. var. alpicola (Rydb.) Garrett Native ACMIAcommon yarrow · Asteraceae 2 counties
- Achillea millefolium L. var. occidentalis DC. Native ACMIOwestern yarrow · Asteraceae 21 counties
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Achillea nobilis L. Introduced ACNOnoble yarrow · Asteraceae 3 counties -
Achillea ptarmica L. Introduced ACPTsneezeweed · Asteraceae 4 counties -
Achillea sibirica Ledeb. Native ACSISiberian yarrow · Asteraceae 1 county -
Achnatherum hymenoides (Roem. & Schult.) Barkworth Native ACHYIndian ricegrass · Poaceae 18 counties -
Achnatherum lettermanii (Vasey) Barkworth Native ACLE9Letterman's needlegrass · Poaceae 2 counties -
Achnatherum nelsonii (Scribn.) Barkworth Native ACNE9Columbia needlegrass · Poaceae 4 counties - Achnatherum nelsonii (Scribn.) Barkworth ssp. dorei (Barkworth & Maze) Barkworth Native ACNEDDore's needlegrass · Poaceae 2 counties
- Achnatherum nelsonii (Scribn.) Barkworth ssp. nelsonii Native ACNEN2Columbia needlegrass · Poaceae 4 counties
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Achnatherum occidentale (Thurb.) Barkworth Native ACOC3western needlegrass · Poaceae 2 counties - Achnatherum occidentale (Thurb.) Barkworth ssp. pubescens (Vasey) Barkworth Native ACOCPpubescent western needlegrass · Poaceae 2 counties
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Achnatherum pinetorum (M.E. Jones) Barkworth Native ACPI2pine needlegrass · Poaceae 1 county -
Achnatherum richardsonii (Link) Barkworth Native ACRI8Richardson's needlegrass · Poaceae 3 counties -
Acinos arvensis (Lam.) Dandy Introduced ACAR2basil thyme · Lamiaceae 1 county -
Aconitum columbianum Nutt. Native ACCO4Columbian monkshood · Ranunculaceae 7 counties - Aconitum columbianum Nutt. ssp. columbianum Native ACCOC3Columbian monkshood · Ranunculaceae 7 counties
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Acroptilon repens (L.) DC. Introduced ACRE3hardheads · Asteraceae 56 counties -
Actaea rubra (Aiton) Willd. Native ACRU2red baneberry · Ranunculaceae 10 counties - Actaea rubra (Aiton) Willd. ssp. arguta (Nutt.) Hultén Native ACRUA8red baneberry · Ranunculaceae 2 counties
- Actaea rubra (Aiton) Willd. ssp. rubra Native ACRUR2red baneberry · Ranunculaceae 1 county
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Adenocaulon bicolor Hook. Native ADBIAmerican trailplant · Asteraceae 4 counties -
Adiantum aleuticum (Rupr.) Paris Native ADALAleutian maidenhair · Pteridaceae 1 county -
Adonis aestivalis L. Introduced ADAEsummer pheasant's eye · Ranunculaceae 1 county -
Adonis annua L. Introduced ADANblooddrops · Ranunculaceae 2 counties -
Adoxa moschatellina L. Native ADMOmuskroot · Adoxaceae 3 counties -
Aegilops cylindrica Host Introduced AECYjointed goatgrass · Poaceae 12 counties -
Aegopodium podagraria L. Introduced AEPObishop's goutweed · Apiaceae 1 county -
Agastache foeniculum (Pursh) Kuntze Native AGFOblue giant hyssop · Lamiaceae 3 counties -
Agastache urticifolia (Benth.) Kuntze Native AGURnettleleaf giant hyssop · Lamiaceae 12 counties - Agastache urticifolia (Benth.) Kuntze var. urticifolia Native AGURUnettleleaf giant hyssop · Lamiaceae 12 counties
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Agoseris aurantiaca (Hook.) Greene Native AGAU2orange agoseris · Asteraceae 12 counties - Agoseris aurantiaca (Hook.) Greene var. aurantiaca Native AGAUAorange agoseris · Asteraceae 2 counties
- Agoseris aurantiaca (Hook.) Greene var. purpurea (A. Gray) Cronquist Native AGAUPorange agoseris · Asteraceae 2 counties
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Agoseris glauca (Pursh) Raf. Native AGGLpale agoseris · Asteraceae 46 counties - Agoseris glauca (Pursh) Raf. var. dasycephala (Torr. & A. Gray) Jeps. Native AGGLDpale agoseris · Asteraceae 4 counties
- Agoseris glauca (Pursh) Raf. var. glauca Native AGGLGpale agoseris · Asteraceae 4 counties
- Agoseris glauca (Pursh) Raf. var. laciniata (D.C. Eaton) Smiley Native AGGLLfalse agoseris · Asteraceae 4 counties
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Agoseris grandiflora (Nutt.) Greene Native AGGRbigflower agoseris · Asteraceae 1 county -
Agoseris heterophylla (Nutt.) Greene Native AGHE2annual agoseris · Asteraceae 2 counties - Agoseris heterophylla (Nutt.) Greene var. heterophylla Native AGHEHannual agoseris · Asteraceae 2 counties
- Agoseris lackschewitzii Douglass M. Hend. & R. Moseley Native AGLA9Mill Creek agoseris · Asteraceae 2 counties
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Agrimonia striata Michx. Native AGSTroadside agrimony · Rosaceae 5 counties -
Agropyron cristatum (L.) Gaertn. Introduced AGCRcrested wheatgrass · Poaceae 44 counties - Agropyron cristatum (L.) Gaertn. ssp. pectinatum (M. Bieb.) Tzvelev Introduced AGCRP8crested wheatgrass · Poaceae 44 counties
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Agropyron desertorum (Fisch. ex Link) Schult. Introduced AGDE2desert wheatgrass · Poaceae 3 counties -
Agropyron fragile (Roth) P. Candargy Introduced AGFRSiberian wheatgrass · Poaceae 2 counties -
Agrostemma githago L. Introduced AGGIcommon corncockle · Caryophyllaceae 12 counties -
Agrostis exarata Trin. Native AGEXspike bentgrass · Poaceae 3 counties -
Agrostis humilis Vasey Native AGHUalpine bentgrass · Poaceae 2 counties -
Agrostis idahoensis Nash Native AGIDIdaho bentgrass · Poaceae 1 county -
Agrostis mertensii Trin. Native AGME3northern bentgrass · Poaceae 1 county -
Agrostis oregonensis Vasey Native AGOROregon bentgrass · Poaceae 1 county -
Agrostis pauzhetica Prob. Native AGPA9Thermal Bent · Poaceae 2 counties - Agrostis scabra Willd. Native AGSC5rough bentgrass · Poaceae 6 counties
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Agrostis stolonifera L. Introduced AGST2creeping bentgrass · Poaceae 46 counties -
Agrostis variabilis Rydb. Native AGVAmountain bentgrass · Poaceae 1 county -
Alcea rosea L. Introduced ALRO3hollyhock · Malvaceae 5 counties -
Alisma gramineum Lej. Native ALGRnarrowleaf water plantain · Alismataceae 12 counties -
Alisma triviale Pursh Native ALTR7northern water plantain · Alismataceae 15 counties -
Allium acuminatum Hook. Native ALAC4tapertip onion · Liliaceae 5 counties -
Allium brandegeei S. Watson Native ALBRBrandegee's onion · Liliaceae 1 county -
Allium brevistylum S. Watson Native ALBR2shortstyle onion · Liliaceae 9 counties -
Allium canadense L. Native ALCA3meadow garlic · Liliaceae 1 county - Allium canadense L. var. fraseri Ownbey Native ALCAFFraser meadow garlic · Liliaceae 1 county
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Allium cernuum Roth Native ALCE2nodding onion · Liliaceae 29 counties -
Allium geyeri S. Watson Native ALGEGeyer's onion · Liliaceae 8 counties - Allium geyeri S. Watson var. tenerum M.E. Jones Native ALGETbulbil onion · Liliaceae 4 counties
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Allium schoenoprasum L. Both ALSCwild chives · Liliaceae 9 counties - Allium schoenoprasum L. var. schoenoprasum Introduced ALSCS2wild chives · Liliaceae 2 counties
- Allium schoenoprasum L. var. sibiricum (L.) Hartm. Native ALSCSwild chives · Liliaceae 8 counties
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Allium simillimum L.F. Hend. Native ALSIsimil onion · Liliaceae 1 county -
Allium textile A. Nelson & J.F. Macbr. Native ALTEtextile onion · Liliaceae 41 counties -
Almutaster pauciflorus (Nutt.) Á. Löve & D. Löve Native ALPA14alkali marsh aster · Asteraceae 1 county -
Alnus incana (L.) Moench Native ALIN2gray alder · Betulaceae 12 counties - Alnus incana (L.) Moench ssp. tenuifolia (Nutt.) Breitung Native ALINTthinleaf alder · Betulaceae 12 counties
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Alnus viridis (Chaix) DC. Native ALVI5green alder · Betulaceae 12 counties - Alnus viridis (Chaix) DC. ssp. sinuata (Regel) Á. Löve & D. Löve Native ALVISSitka alder · Betulaceae 12 counties
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Alopecurus aequalis Sobol. Native ALAEshortawn foxtail · Poaceae 5 counties - Alopecurus aequalis Sobol. var. aequalis Native ALAEAshortawn foxtail · Poaceae 5 counties
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Alopecurus arundinaceus Poir. Introduced ALARcreeping meadow foxtail · Poaceae 7 counties -
Alopecurus carolinianus Walter Native ALCA4Carolina foxtail · Poaceae 2 counties - Alopecurus geniculatus L. Introduced ALGE2water foxtail · Poaceae 2 counties
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Alopecurus magellanicus Lam. Native ALMA8Alpine Meadow-Foxtail · Poaceae 2 counties -
Alopecurus pratensis L. Introduced ALPR3meadow foxtail · Poaceae 19 counties -
Alyssum alyssoides (L.) L. Introduced ALAL3pale madwort · Brassicaceae 31 counties -
Alyssum desertorum Stapf Introduced ALDEdesert madwort · Brassicaceae 35 counties - Alyssum desertorum Stapf var. desertorum Introduced ALDEDdesert madwort · Brassicaceae 35 counties
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Amaranthus albus L. Introduced AMALprostrate pigweed · Amaranthaceae 18 counties -
Amaranthus arenicola I.M. Johnst. Native AMARsandhill amaranth · Amaranthaceae 1 county -
Amaranthus blitoides S. Watson Introduced AMBLmat amaranth · Amaranthaceae 41 counties -
Amaranthus californicus (Moq.) S. Watson Native AMCACalifornia amaranth · Amaranthaceae 2 counties -
Amaranthus hybridus L. Native AMHYslim amaranth · Amaranthaceae 9 counties -
Amaranthus powellii S. Watson Native AMPO2Powell's amaranth · Amaranthaceae 1 county - Amaranthus powellii S. Watson ssp. powellii Native AMPOPPowell's amaranth · Amaranthaceae 1 county
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Amaranthus retroflexus L. Native AMREredroot amaranth · Amaranthaceae 36 counties -
Ambrosia acanthicarpa Hook. Native AMAC2flatspine bur ragweed · Asteraceae 4 counties -
Ambrosia artemisiifolia L. Both AMAR2annual ragweed · Asteraceae 12 counties - Ambrosia artemisiifolia L. var. elatior (L.) Descourtils Introduced AMAREannual ragweed · Asteraceae 12 counties
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Ambrosia psilostachya DC. Native AMPSCuman ragweed · Asteraceae 13 counties -
Ambrosia tomentosa Nutt. Native AMTO3skeletonleaf bur ragweed · Asteraceae 3 counties -
Ambrosia trifida L. Native AMTRgreat ragweed · Asteraceae 15 counties - Ambrosia trifida L. var. trifida Native AMTRT2great ragweed · Asteraceae 14 counties
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Amelanchier alnifolia (Nutt.) Nutt. ex M. Roem. Native AMAL2Saskatoon serviceberry · Rosaceae 34 counties - Amelanchier alnifolia (Nutt.) Nutt. ex M. Roem. var. alnifolia Native AMALASaskatoon serviceberry · Rosaceae 5 counties
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Amelanchier humilis Wiegand Native AMHU2low serviceberry · Rosaceae 2 counties - Amelanchier pumila (Torr. & A. Gray) Nutt. ex M. Roem. Native AMPU5dwarf serviceberry · Rosaceae 2 counties
- Amelanchier sanguinea (Pursh) DC. Native AMSAroundleaf serviceberry · Rosaceae 1 county
- Amelanchier sanguinea (Pursh) DC. var. sanguinea Native AMSASroundleaf serviceberry · Rosaceae 1 county
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Amelanchier utahensis Koehne Native AMUTUtah serviceberry · Rosaceae 3 counties - Amelanchier utahensis Koehne var. utahensis Native AMUTUUtah serviceberry · Rosaceae 3 counties
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Amerorchis rotundifolia (Banks ex Pursh) Hultén Native AMROroundleaf orchid · Orchidaceae 1 county -
Ammannia robusta Heer & Regel Native AMRO3grand redstem · Lythraceae 4 counties -
Amorpha canescens Pursh Native AMCA6leadplant · Fabaceae 1 county -
Amsinckia menziesii (Lehm.) A. Nelson & J.F. Macbr. Native AMMEMenzies' fiddleneck · Boraginaceae 5 counties - Amsinckia menziesii (Lehm.) A. Nelson & J.F. Macbr. var. intermedia (Fisch. & C.A. Mey.) Ganders Native AMMEI2common fiddleneck · Boraginaceae 5 counties
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Anagallis arvensis L. Introduced ANARscarlet pimpernel · Primulaceae 1 county - Anagallis arvensis L. ssp. arvensis Introduced ANARA7scarlet pimpernel · Primulaceae 1 county
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Anagallis minima (L.) Krause Native ANMI4chaffweed · Primulaceae 4 counties -
Anaphalis margaritacea (L.) Benth. Native ANMAwestern pearly everlasting · Asteraceae 22 counties -
Anchusa arvensis (L.) M. Bieb. Introduced ANAR16small bugloss · Boraginaceae 4 counties -
Anchusa azurea Mill. Introduced ANAZItalian bugloss · Boraginaceae 2 counties -
Anchusa officinalis L. Introduced ANOFcommon bugloss · Boraginaceae 6 counties -
Andropogon gerardii Vitman Native ANGEbig bluestem · Poaceae 3 counties -
Andropogon hallii Hack. Native ANHAsand bluestem · Poaceae 1 county -
Androsace chamaejasme Wulfen Native ANCHsweetflower rockjasmine · Primulaceae 2 counties - Androsace chamaejasme Wulfen ssp. carinata (Torr.) Hultén Native ANCHCsweetflower rockjasmine · Primulaceae 1 county
- Androsace chamaejasme Wulfen ssp. lehmanniana (Spreng.) Hultén Native ANCHLLehmann's rockjasmine · Primulaceae 1 county
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Androsace filiformis Retz. Native ANFIfiliform rockjasmine · Primulaceae 8 counties -
Androsace occidentalis Pursh Native ANOC2western rockjasmine · Primulaceae 17 counties -
Androsace septentrionalis L. Native ANSE4pygmyflower rockjasmine · Primulaceae 20 counties - Androsace septentrionalis L. ssp. puberulenta (Rydb.) G.T. Robbins Native ANSEP2pygmyflower rockjasmine · Primulaceae 1 county
- Androsace septentrionalis L. ssp. subulifera (A. Gray) G.T. Robbins Native ANSES4pygmyflower rockjasmine · Primulaceae 2 counties
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Anemone canadensis L. Native ANCA8Canadian anemone · Ranunculaceae 6 counties -
Anemone cylindrica A. Gray Native ANCYcandle anemone · Ranunculaceae 18 counties -
Anemone lithophila Rydb. Native ANLI4Little Belt Mountain thimbleweed · Ranunculaceae 1 county -
Anemone multifida Poir. Native ANMUPacific anemone · Ranunculaceae 28 counties - Anemone multifida Poir. var. multifida Native ANMUM3Pacific anemone · Ranunculaceae 3 counties
- Anemone multifida Poir. var. tetonensis (Porter ex Britton) C.L. Hitchc. Native ANMUTPacific anemone · Ranunculaceae 2 counties
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Anemone parviflora Michx. Native ANPAsmallflowered anemone · Ranunculaceae 3 counties - Anemone parviflora Michx. var. parviflora Native ANPAP2smallflowered anemone · Ranunculaceae 3 counties
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Anemone piperi Britton ex Rydb. Native ANPIPiper's anemone · Ranunculaceae 1 county -
Anethum graveolens L. Introduced ANGR2dill · Apiaceae 3 counties -
Angelica arguta Nutt. Native ANAR3Lyall's angelica · Apiaceae 21 counties -
Angelica pinnata S. Watson Native ANPI2small-leaf angelica · Apiaceae 2 counties -
Angelica roseana L.F. Hend. Native ANROrose angelica · Apiaceae 3 counties -
Antennaria alpina (L.) Gaertn. Native ANAL4alpine pussytoes · Asteraceae 6 counties -
Antennaria anaphaloides Rydb. Native ANAN2pearly pussytoes · Asteraceae 3 counties -
Antennaria aromatica Evert Native ANAR10scented pussytoes · Asteraceae 1 county -
Antennaria corymbosa E.E. Nelson Native ANCOflat-top pussytoes · Asteraceae 5 counties -
Antennaria dimorpha (Nutt.) Torr. & A. Gray Native ANDI2low pussytoes · Asteraceae 14 counties -
Antennaria flagellaris (A. Gray) A. Gray Native ANFL2whip pussytoes · Asteraceae 1 county -
Antennaria howellii Greene Native ANHOHowell's pussytoes · Asteraceae 3 counties - Antennaria howellii Greene ssp. howellii Native ANHOHHowell's pussytoes · Asteraceae 1 county
- Antennaria howellii Greene ssp. neodioica (Greene) Bayer Native ANHONHowell's pussytoes · Asteraceae 1 county
- Antennaria howellii Greene ssp. petaloidea (Fernald) Bayer Native ANHOPsmall pussytoes · Asteraceae 2 counties
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Antennaria lanata (Hook.) Greene Native ANLA3woolly pussytoes · Asteraceae 6 counties -
Antennaria luzuloides Torr. & A. Gray Native ANLU2rush pussytoes · Asteraceae 7 counties - Antennaria luzuloides Torr. & A. Gray ssp. luzuloides Native ANLULrush pussytoes · Asteraceae 7 counties
- Antennaria media Greene Native ANME2Rocky Mountain pussytoes · Asteraceae 2 counties
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Antennaria microphylla Rydb. Native ANMI3littleleaf pussytoes · Asteraceae 4 counties -
Antennaria monocephala DC. Native ANMO9pygmy pussytoes · Asteraceae 1 county - Antennaria monocephala DC. ssp. angustata (Greene) Hultén Native ANMOApygmy pussytoes · Asteraceae 1 county
- Antennaria neglecta Greene Native ANNEfield pussytoes · Asteraceae 14 counties
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Antennaria parlinii Fernald Native ANPA9Parlin's pussytoes · Asteraceae 1 county - Antennaria parlinii Fernald ssp. fallax (Greene) Bayer & Stebbins Native ANPAFParlin's pussytoes · Asteraceae 1 county
- Antennaria parvifolia Nutt. Native ANPA4small-leaf pussytoes · Asteraceae 42 counties
- Antennaria pulcherrima (Hook.) Greene Native ANPUshowy pussytoes · Asteraceae 15 counties
- Antennaria pulcherrima (Hook.) Greene ssp. pulcherrima Native ANPUPhandsome pussy-toes · Asteraceae 15 counties
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Antennaria racemosa Hook. Native ANRAraceme pussytoes · Asteraceae 16 counties -
Antennaria rosea Greene Native ANRO2rosy pussytoes · Asteraceae 49 counties - Antennaria rosea Greene ssp. rosea Native ANRORrosy pussytoes · Asteraceae 1 county
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Antennaria umbrinella Rydb. Native ANUMumber pussytoes · Asteraceae 8 counties -
Anthemis arvensis L. Introduced ANAR6corn chamomile · Asteraceae 2 counties -
Anthemis cotula L. Introduced ANCO2stinking chamomile · Asteraceae 11 counties -
Anthemis tinctoria L. Introduced ANTIgolden chamomile · Asteraceae 5 counties -
Anthriscus cerefolium (L.) Hoffm. Introduced ANCEgarden chervil · Apiaceae 1 county -
Apera interrupta (L.) P. Beauv. Introduced APINdense silkybent · Poaceae 10 counties -
Apocynum androsaemifolium L. Native APAN2spreading dogbane · Apocynaceae 26 counties -
Apocynum cannabinum L. Native APCAIndianhemp · Apocynaceae 21 counties - Apocynum ×floribundum Greene (pro sp.) [androsaemifolium × cannabinum] Native APFLApocynaceae 11 counties
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Aquilegia brevistyla Hook. Native AQBRsmallflower columbine · Ranunculaceae 2 counties -
Aquilegia coerulea James Native AQCOColorado blue columbine · Ranunculaceae 4 counties - Aquilegia coerulea James var. alpina A. Nelson Native AQCOAColorado alpine columbine · Ranunculaceae 1 county
- Aquilegia coerulea James var. coerulea Native AQCOCColorado blue columbine · Ranunculaceae 2 counties
- Aquilegia coerulea James var. ochroleuca Hook. Native AQCOOwhite Colorado columbine · Ranunculaceae 2 counties
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Aquilegia flavescens S. Watson Native AQFLyellow columbine · Ranunculaceae 15 counties - Aquilegia flavescens S. Watson var. flavescens Native AQFLFyellow columbine · Ranunculaceae 2 counties
- Aquilegia flavescens S. Watson var. miniata A. Nelson & J.F. Macbr. Native AQFLMyellow columbine · Ranunculaceae 15 counties
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Aquilegia formosa Fisch. ex DC. Native AQFOwestern columbine · Ranunculaceae 1 county -
Aquilegia jonesii Parry Native AQJOJones' columbine · Ranunculaceae 6 counties - Aquilegia jonesii Parry var. jonesii Native AQJOJJones' columbine · Ranunculaceae 1 county
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Arabidopsis thaliana (L.) Heynh. Introduced ARTHmouseear cress · Brassicaceae 22 counties -
Arabis drummondii A. Gray Native ARDRDrummond's rockcress · Brassicaceae 15 counties -
Arabis eschscholtziana Andrz. Native ARES5Eschscholtz's hairy rockcress · Brassicaceae 1 county - Arabis fructicosa A. Nelson Native ARFR5fruit rockcress · Brassicaceae 14 counties
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Arabis glabra (L.) Bernh. Native ARGLtower rockcress · Brassicaceae 28 counties -
Arabis hirsuta (L.) Scop. Native ARHIhairy rockcress · Brassicaceae 13 counties - Arabis hirsuta (L.) Scop. var. glabrata Torr. & A. Gray Native ARHIGmountain rockcress · Brassicaceae 1 county
- Arabis hirsuta (L.) Scop. var. pycnocarpa (M. Hopkins) Rollins Native ARHIPcreamflower rockcress · Brassicaceae 13 counties
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Arabis holboellii Hornem. Native ARHO2Holboell's rockcress · Brassicaceae 42 counties - Arabis holboellii Hornem. var. collinsii (Fernald) Rollins Native ARHOCCollins' rockcress · Brassicaceae 10 counties
- Arabis holboellii Hornem. var. pendulocarpa (A. Nelson) Rollins Native ARHOP2dropseed rockcress · Brassicaceae 2 counties
- Arabis holboellii Hornem. var. pinetorum (Tidestr.) Rollins Native ARHOP3Holboell's rockcress · Brassicaceae 6 counties
- Arabis holboellii Hornem. var. retrofracta (Graham) Rydb. Native ARHORsecond rockcress · Brassicaceae 4 counties
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Arabis lemmonii S. Watson Native ARLELemmon's rockcress · Brassicaceae 7 counties - Arabis lemmonii S. Watson var. lemmonii Native ARLELLemmon's rockcress · Brassicaceae 2 counties
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Arabis lyallii S. Watson Native ARLYLyall's rockcress · Brassicaceae 5 counties - Arabis lyallii S. Watson var. lyallii Native ARLYLLyall's rockcress · Brassicaceae 3 counties
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Arabis microphylla Nutt. Native ARMIlittleleaf rockcress · Brassicaceae 4 counties - Arabis microphylla Nutt. var. macounii (S. Watson) Rollins Native ARMIMMacoun's rockcress · Brassicaceae 1 county
- Arabis microphylla Nutt. var. microphylla Native ARMIM2littleleaf rockcress · Brassicaceae 2 counties
- Arabis murrayi G. Mulligan Native ARMU6Murray's rockcress · Brassicaceae 1 county
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Arabis nuttallii B.L. Rob. Native ARNUNuttall's rockcress · Brassicaceae 19 counties -
Arabis sparsiflora Nutt. Native ARSPsicklepod rockcress · Brassicaceae 2 counties - Arabis sparsiflora Nutt. var. subvillosa (S. Watson) Rollins Native ARSPShairystem rockcress · Brassicaceae 2 counties
- Arabis williamsii Rollins Native ARWIWind River rockcress · Brassicaceae 1 county
- Arabis williamsii Rollins var. saximontana (Rollins) Rollins Native ARWISCross Mountain rockcress · Brassicaceae 1 county
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Arabis ×divaricarpa A. Nelson (pro sp.) [drummondii × holboellii] Native ARDI2spreadingpod rockcress · Brassicaceae 12 counties -
Aralia nudicaulis L. Native ARNU2wild sarsaparilla · Araliaceae 4 counties -
Arceuthobium americanum Nutt. ex Engelm. Native ARAMAmerican dwarf mistletoe · Viscaceae 5 counties -
Arceuthobium campylopodum Engelm. Native ARCA3western dwarf mistletoe · Viscaceae 1 county -
Arceuthobium cyanocarpum (A. Nelson ex Rydb.) A. Nelson Native ARCY2limber pine dwarf mistletoe · Viscaceae 1 county -
Arceuthobium douglasii Engelm. Native ARDODouglas-fir dwarf mistletoe · Viscaceae 3 counties -
Arceuthobium laricis (Piper) H. St. John Native ARLA11larch dwarf mistletoe · Viscaceae 1 county -
Arctium lappa L. Introduced ARLA3greater burdock · Asteraceae 14 counties - Arctium minus Bernh. Introduced ARMI2lesser burdock · Asteraceae 30 counties
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Arctostaphylos rubra (Rehder & Wilson) Fernald Native ARRUred fruit bearberry · Ericaceae 1 county -
Arctostaphylos uva-ursi (L.) Spreng. Native ARUVkinnikinnick · Ericaceae 36 counties -
Arenaria capillaris Poir. Native ARCA7slender mountain sandwort · Caryophyllaceae 5 counties - Arenaria capillaris Poir. ssp. americana Maguire Native ARCAAfescue sandwort · Caryophyllaceae 5 counties
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Arenaria congesta Nutt. Native ARCO5ballhead sandwort · Caryophyllaceae 30 counties - Arenaria congesta Nutt. var. congesta Native ARCOC4ballhead sandwort · Caryophyllaceae 2 counties
- Arenaria congesta Nutt. var. lithophila (Rydb.) Maguire Native ARCOLrock-loving sandwort · Caryophyllaceae 3 counties
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Arenaria hookeri Nutt. Native ARHO4Hooker's sandwort · Caryophyllaceae 15 counties - Arenaria hookeri Nutt. ssp. hookeri Native ARHOH3Hooker's sandwort · Caryophyllaceae 15 counties
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Arenaria serpyllifolia L. Introduced ARSE2thymeleaf sandwort · Caryophyllaceae 11 counties -
Argemone polyanthemos (Fedde) G.B. Ownbey Native ARPO2crested pricklypoppy · Papaveraceae 3 counties -
Argentina anserina (L.) Rydb. Native ARAN7silverweed cinquefoil · Rosaceae 31 counties -
Aristida purpurea Nutt. Native ARPU9purple threeawn · Poaceae 8 counties - Aristida purpurea Nutt. var. longiseta (Steud.) Vasey Native ARPULFendler threeawn · Poaceae 8 counties
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Armoracia rusticana G. Gaertn., B. Mey. & Scherb. Introduced ARRU4horseradish · Brassicaceae 8 counties - Arnica amplexicaulis Nutt. Native ARAM2clasping arnica · Asteraceae 1 county
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Arnica angustifolia Vahl Native ARAN5narrowleaf arnica · Asteraceae 1 county - Arnica angustifolia Vahl ssp. tomentosa (Macoun) G.W. Douglas & G. Ruyle-Douglas Native ARANTnarrowleaf arnica · Asteraceae 1 county
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Arnica chamissonis Less. Native ARCH3Chamisso arnica · Asteraceae 7 counties - Arnica chamissonis Less. ssp. foliosa (Nutt.) Maguire Native ARCHFChamisso arnica · Asteraceae 2 counties
- Arnica chamissonis Less. ssp. foliosa (Nutt.) Maguire var. andina (Nutt.) Ediger & T.M. Barkley Native ARCHA2Chamisso arnica · Asteraceae 2 counties
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Arnica cordifolia Hook. Native ARCO9heartleaf arnica · Asteraceae 24 counties -
Arnica fulgens Pursh Native ARFU3foothill arnica · Asteraceae 16 counties -
Arnica gracilis Rydb. Native ARGR14smallhead arnica · Asteraceae 2 counties -
Arnica latifolia Bong. Native ARLA8broadleaf arnica · Asteraceae 18 counties -
Arnica longifolia D.C. Eaton Native ARLO6spearleaf arnica · Asteraceae 5 counties -
Arnica mollis Hook. Native ARMO4hairy arnica · Asteraceae 6 counties -
Arnica parryi A. Gray Native ARPA13Parry's arnica · Asteraceae 2 counties - Arnica parryi A. Gray ssp. parryi Native ARPAP3Parry's arnica · Asteraceae 2 counties
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Arnica rydbergii Greene Native ARRYRydberg's arnica · Asteraceae 10 counties -
Arnica sororia Greene Native ARSO2twin arnica · Asteraceae 28 counties -
Arnica ×diversifolia Greene (pro sp.) [amplexicaulis or mollis × cordifolia or latifolia] Native ARDI7rayless arnica · Asteraceae 2 counties -
Arrhenatherum elatius (L.) P. Beauv. ex J. Presl & C. Presl Introduced AREL3tall oatgrass · Poaceae 9 counties - Arrhenatherum elatius (L.) P. Beauv. ex J. Presl & C. Presl var. elatius Introduced ARELEtall oatgrass · Poaceae 9 counties
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Artemisia abrotanum L. Introduced ARAB2southernwood · Asteraceae 1 county -
Artemisia absinthium L. Introduced ARAB3absinthium · Asteraceae 29 counties -
Artemisia annua L. Introduced ARAN3sweet sagewort · Asteraceae 3 counties -
Artemisia arbuscula Nutt. Native ARAR8little sagebrush · Asteraceae 7 counties - Artemisia arbuscula Nutt. ssp. arbuscula Native ARARAlittle sagebrush · Asteraceae 1 county
- Artemisia arbuscula Nutt. ssp. longiloba (Osterh.) L.M. Shultz Native ARARLlittle sagebrush · Asteraceae 1 county
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Artemisia arctica Less. Native ARAR9boreal sagebrush · Asteraceae 1 county - Artemisia arctica Less. ssp. arctica Native ARARA2boreal sagebrush · Asteraceae 1 county
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Artemisia biennis Willd. Both ARBI2biennial wormwood · Asteraceae 14 counties - Artemisia biennis Willd. var. biennis Introduced ARBIBbiennial wormwood · Asteraceae 14 counties
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Artemisia campestris L. Native ARCA12field sagewort · Asteraceae 30 counties - Artemisia campestris L. ssp. borealis (Pall.) H.M. Hall & Clem. Native ARCAB2field sagewort · Asteraceae 3 counties
- Artemisia campestris L. ssp. borealis (Pall.) H.M. Hall & Clem. var. borealis (Pall.) M. Peck Native ARCAB4field sagewort · Asteraceae 1 county
- Artemisia campestris L. ssp. borealis (Pall.) H.M. Hall & Clem. var. scouleriana (Hook.) Cronquist Native ARCAS5field sagewort · Asteraceae 3 counties
- Artemisia campestris L. ssp. caudata (Michx.) H.M. Hall & Clem. Native ARCACfield sagewort · Asteraceae 6 counties
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Artemisia cana Pursh Native ARCA13silver sagebrush · Asteraceae 36 counties - Artemisia cana Pursh ssp. cana Native ARCAC5silver sagebrush · Asteraceae 4 counties
- Artemisia cana Pursh ssp. viscidula (Osterh.) Beetle Native ARCAV2silver sagebrush · Asteraceae 2 counties
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Artemisia dracunculus L. Native ARDR4tarragon · Asteraceae 20 counties -
Artemisia frigida Willd. Native ARFR4prairie sagewort · Asteraceae 53 counties - Artemisia lindleyana Besser Native ARLI2Columbia River wormwood · Asteraceae 5 counties
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Artemisia longifolia Nutt. Native ARLO7longleaf wormwood · Asteraceae 10 counties -
Artemisia ludoviciana Nutt. Both ARLUwhite sagebrush · Asteraceae 56 counties - Artemisia ludoviciana Nutt. ssp. candicans (Rydb.) D.D. Keck Native ARLUC8white sagebrush · Asteraceae 2 counties
- Artemisia ludoviciana Nutt. ssp. incompta (Nutt.) D.D. Keck Native ARLUI2white sagebrush · Asteraceae 2 counties
- Artemisia ludoviciana Nutt. ssp. ludoviciana Native ARLUL2white sagebrush · Asteraceae 9 counties
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Artemisia michauxiana Besser Native ARMI4Michaux's wormwood · Asteraceae 10 counties - Artemisia nova A. Nelson Native ARNO4black sagebrush · Asteraceae 1 county
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Artemisia pedatifida Nutt. Native ARPE6birdfoot sagebrush · Asteraceae 3 counties -
Artemisia scopulorum A. Gray Native ARSCalpine sagebrush · Asteraceae 5 counties -
Artemisia tridentata Nutt. Native ARTR2big sagebrush · Asteraceae 39 counties - Artemisia tridentata Nutt. ssp. spiciformis (Osterh.) Kartesz & Gandhi Native ARTRS2big sagebrush · Asteraceae 1 county
- Artemisia tridentata Nutt. ssp. tridentata Native ARTRTbasin big sagebrush · Asteraceae 2 counties
- Artemisia tridentata Nutt. ssp. vaseyana (Rydb.) Beetle Native ARTRVmountain big sagebrush · Asteraceae 2 counties
- Artemisia tridentata Nutt. ssp. wyomingensis Beetle & Young Native ARTRW8Wyoming big sagebrush · Asteraceae 3 counties
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Artemisia tripartita Rydb. Native ARTR4threetip sagebrush · Asteraceae 4 counties - Artemisia tripartita Rydb. ssp. rupicola Beetle Native ARTRR2Wyoming threetip sagebrush · Asteraceae 1 county
- Artemisia tripartita Rydb. ssp. tripartita Native ARTRT2threetip sagebrush · Asteraceae 3 counties
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Asarum caudatum Lindl. Native ASCA2British Columbia wildginger · Aristolochiaceae 1 county -
Asclepias pumila (A. Gray) Vail Native ASPUplains milkweed · Asclepiadaceae 6 counties -
Asclepias speciosa Torr. Native ASSPshowy milkweed · Asclepiadaceae 31 counties -
Asclepias stenophylla A. Gray Native ASSTslimleaf milkweed · Asclepiadaceae 1 county -
Asclepias syriaca L. Native ASSYcommon milkweed · Asclepiadaceae 18 counties -
Asclepias verticillata L. Native ASVEwhorled milkweed · Asclepiadaceae 11 counties -
Asclepias viridiflora Raf. Native ASVIgreen comet milkweed · Asclepiadaceae 15 counties -
Asparagus officinalis L. Introduced ASOFgarden asparagus · Liliaceae 12 counties -
Asperugo procumbens L. Introduced ASPRGerman-madwort · Boraginaceae 41 counties -
Aspidotis densa (Brack.) Lellinger Native ASDE6Indian's dream · Pteridaceae 1 county -
Asplenium trichomanes-ramosum L. Native ASTR10brightgreen spleenwort · Aspleniaceae 1 county -
Astragalus agrestis Douglas ex G. Don Native ASAG2purple milkvetch · Fabaceae 39 counties -
Astragalus alpinus L. Native ASAL7alpine milkvetch · Fabaceae 12 counties - Astragalus alpinus L. var. alpinus Native ASALA4alpine milkvetch · Fabaceae 12 counties
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Astragalus americanus (Hook.) M.E. Jones Native ASAM3American milkvetch · Fabaceae 10 counties -
Astragalus aretioides (M.E. Jones) Barneby Native ASAR3cushion milkvetch · Fabaceae 1 county -
Astragalus argophyllus Nutt. Native ASAR4silverleaf milkvetch · Fabaceae 2 counties - Astragalus argophyllus Nutt. var. argophyllus Native ASARAsilverleaf milkvetch · Fabaceae 1 county
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Astragalus australis (L.) Lam. Native ASAU4Indian milkvetch · Fabaceae 13 counties -
Astragalus barrii Barneby Native ASBABarr's milkvetch · Fabaceae 2 counties -
Astragalus bisulcatus (Hook.) A. Gray Native ASBI2twogrooved milkvetch · Fabaceae 43 counties - Astragalus bisulcatus (Hook.) A. Gray var. bisulcatus Native ASBIBtwogrooved milkvetch · Fabaceae 43 counties
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Astragalus bodinii Sheldon Native ASBOBodin's milkvetch · Fabaceae 1 county -
Astragalus bourgovii A. Gray Native ASBO3Bourgov's milkvetch · Fabaceae 7 counties -
Astragalus canadensis L. Native ASCA11Canadian milkvetch · Fabaceae 19 counties - Astragalus canadensis L. var. brevidens (Gandog.) Barneby Native ASCABshorttooth Canadian milkvetch · Fabaceae 2 counties
- Astragalus canadensis L. var. canadensis Native ASCAC6Canadian milkvetch · Fabaceae 2 counties
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Astragalus ceramicus Sheldon Native ASCEpainted milkvetch · Fabaceae 2 counties - Astragalus ceramicus Sheldon var. filifolius (A. Gray) F.J. Herm. Native ASCEFpainted milkvetch · Fabaceae 1 county
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Astragalus chamaeleuce A. Gray Native ASCH4cicada milkvetch · Fabaceae 1 county - Astragalus chamaeleuce A. Gray var. chamaeleuce Native ASCHC2cicada milkvetch · Fabaceae 1 county
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Astragalus cibarius Sheldon Native ASCI2browse milkvetch · Fabaceae 7 counties -
Astragalus cicer L. Introduced ASCI4chickpea milkvetch · Fabaceae 16 counties -
Astragalus convallarius Greene Native ASCO12lesser rushy milkvetch · Fabaceae 2 counties - Astragalus convallarius Greene var. convallarius Native ASCOC9lesser rushy milkvetch · Fabaceae 2 counties
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Astragalus crassicarpus Nutt. Native ASCR2groundplum milkvetch · Fabaceae 41 counties - Astragalus crassicarpus Nutt. var. crassicarpus Native ASCRC3groundplum milkvetch · Fabaceae 10 counties
- Astragalus crassicarpus Nutt. var. paysonii (E.H. Kelso) Barneby Native ASCRPgroundplum milkvetch · Fabaceae 2 counties
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Astragalus drummondii Douglas ex Hook. Native ASDR3Drummond's milkvetch · Fabaceae 36 counties -
Astragalus eucosmus B.L. Rob. Native ASEU2elegant milkvetch · Fabaceae 8 counties -
Astragalus falcatus Lam. Introduced ASFA3Russian milkvetch · Fabaceae 2 counties -
Astragalus flexuosus Douglas ex G. Don Native ASFL2flexile milkvetch · Fabaceae 13 counties - Astragalus flexuosus Douglas ex G. Don var. flexuosus Native ASFLFflexile milkvetch · Fabaceae 13 counties
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Astragalus geyeri A. Gray Native ASGEGeyer's milkvetch · Fabaceae 2 counties - Astragalus geyeri A. Gray var. geyeri Native ASGEGGeyer's milkvetch · Fabaceae 2 counties
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Astragalus gilviflorus Sheldon Native ASGI5plains milkvetch · Fabaceae 37 counties - Astragalus gilviflorus Sheldon var. gilviflorus Native ASGIGplains milkvetch · Fabaceae 37 counties
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Astragalus gracilis Nutt. Native ASGR3slender milkvetch · Fabaceae 18 counties -
Astragalus grayi Parry ex S. Watson Native ASGR4Gray's milkvetch · Fabaceae 2 counties -
Astragalus hyalinus M.E. Jones Native ASHY2summer milkvetch · Fabaceae 1 county -
Astragalus inflexus Douglas ex Hook. Native ASIN5bent milkvetch · Fabaceae 6 counties -
Astragalus kentrophyta A. Gray Native ASKEspiny milkvetch · Fabaceae 8 counties - Astragalus kentrophyta A. Gray var. kentrophyta Native ASKEKspiny milkvetch · Fabaceae 1 county
- Astragalus kentrophyta A. Gray var. tegetarius (S. Watson) Dorn Native ASKETmat milkvetch · Fabaceae 7 counties
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Astragalus laxmannii Jacq. Native ASLA27Laxmann's milkvetch · Fabaceae 44 counties - Astragalus laxmannii Jacq. var. robustior (Hook.) Barneby & S.L. Welsh Native ASLARprairie milkvetch · Fabaceae 44 counties
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Astragalus lentiginosus Douglas ex Hook. Native ASLE8freckled milkvetch · Fabaceae 1 county - Astragalus lentiginosus Douglas ex Hook. var. salinus (Howell) Barneby Native ASLESsalty loco milkvetch · Fabaceae 1 county
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Astragalus leptaleus A. Gray Native ASLE9park milkvetch · Fabaceae 1 county -
Astragalus lotiflorus Hook. Native ASLO4lotus milkvetch · Fabaceae 12 counties -
Astragalus microcystis A. Gray Native ASMI4dwarf milkvetch · Fabaceae 9 counties -
Astragalus miser Douglas ex Hook. Native ASMI9timber milkvetch · Fabaceae 28 counties - Astragalus miser Douglas ex Hook. var. decumbens (Nutt. ex Torr. & A. Gray) Cronquist Native ASMIDprostrate milkvetch · Fabaceae 2 counties
- Astragalus miser Douglas ex Hook. var. hylophilus (Rydb.) Barneby Native ASMIHwoody milkvetch · Fabaceae 2 counties
- Astragalus miser Douglas ex Hook. var. praeteritus Barneby Native ASMIP2Yellowstone milkvetch · Fabaceae 1 county
- Astragalus miser Douglas ex Hook. var. tenuifolius (Nutt.) Barneby Native ASMITtimber milkvetch · Fabaceae 1 county
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Astragalus missouriensis Nutt. Native ASMI10Missouri milkvetch · Fabaceae 42 counties - Astragalus missouriensis Nutt. var. missouriensis Native ASMIM5Missouri milkvetch · Fabaceae 42 counties
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Astragalus molybdenus Barneby Native ASMO8Leadville milkvetch · Fabaceae 1 county -
Astragalus oreganus Nutt. Native ASOR2Oregon milkvetch · Fabaceae 1 county -
Astragalus pectinatus (Douglas ex Hook.) Douglas ex G. Don Native ASPE5narrowleaf milkvetch · Fabaceae 32 counties -
Astragalus plattensis Nutt. Native ASPL2Platte River milkvetch · Fabaceae 1 county -
Astragalus purshii Douglas ex Hook. Native ASPU9woollypod milkvetch · Fabaceae 39 counties - Astragalus purshii Douglas ex Hook. var. purshii Native ASPUP7woollypod milkvetch · Fabaceae 5 counties
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Astragalus racemosus Pursh Native ASRA2cream milkvetch · Fabaceae 3 counties - Astragalus racemosus Pursh var. longisetus M.E. Jones Native ASRALcream milkvetch · Fabaceae 2 counties
- Astragalus racemosus Pursh var. racemosus Native ASRAR2cream milkvetch · Fabaceae 1 county
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Astragalus robbinsii (Oakes) A. Gray Native ASRORobbins' milkvetch · Fabaceae 10 counties - Astragalus robbinsii (Oakes) A. Gray var. minor (Hook.) Barneby Native ASROMRobbins' milkvetch · Fabaceae 10 counties
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Astragalus scaphoides (M.E. Jones) Rydb. Native ASSC4Bitterroot milkvetch · Fabaceae 1 county -
Astragalus spatulatus Sheldon Native ASSP6tufted milkvetch · Fabaceae 28 counties -
Astragalus tenellus Pursh Native ASTE5looseflower milkvetch · Fabaceae 20 counties -
Astragalus terminalis S. Watson Native ASTE9railhead milkvetch · Fabaceae 3 counties -
Astragalus vexilliflexus Sheldon Native ASVE5bentflower milkvetch · Fabaceae 25 counties - Astragalus vexilliflexus Sheldon var. vexilliflexus Native ASVEV2bentflower milkvetch · Fabaceae 25 counties
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Athyrium americanum (Butters) Maxon Native ATAMalpine ladyfern · Dryopteridaceae 1 county -
Athyrium filix-femina (L.) Roth Native ATFIcommon ladyfern · Dryopteridaceae 2 counties - Athyrium filix-femina (L.) Roth ssp. cyclosorum (Rupr.) C. Chr. Native ATFICsubarctic ladyfern · Dryopteridaceae 2 counties
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Atriplex argentea Nutt. Native ATAR2silverscale saltbush · Chenopodiaceae 23 counties - Atriplex argentea Nutt. ssp. argentea Native ATARAsilverscale saltbush · Chenopodiaceae 23 counties
- Atriplex argentea Nutt. ssp. argentea var. argentea Native ATARA2silverscale saltbush · Chenopodiaceae 23 counties
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Atriplex canescens (Pursh) Nutt. Native ATCA2fourwing saltbush · Chenopodiaceae 9 counties - Atriplex canescens (Pursh) Nutt. var. canescens Native ATCACfourwing saltbush · Chenopodiaceae 9 counties
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Atriplex confertifolia (Torr. & Frém.) S. Watson Native ATCOshadscale saltbush · Chenopodiaceae 16 counties -
Atriplex gardneri (Moq.) D. Dietr. Native ATGAGardner's saltbush · Chenopodiaceae 28 counties -
Atriplex hortensis L. Introduced ATHOgarden orache · Chenopodiaceae 23 counties -
Atriplex micrantha Ledeb. Introduced ATMI2twoscale saltbush · Chenopodiaceae 13 counties -
Atriplex oblongifolia Waldst. & Kit. Introduced ATOB2oblongleaf orache · Chenopodiaceae 1 county - Atriplex patula L. Introduced ATPA4spear saltbush · Chenopodiaceae 15 counties
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Atriplex powellii S. Watson Native ATPO2Powell's saltweed · Chenopodiaceae 2 counties -
Atriplex rosea L. Introduced ATROtumbling saltweed · Chenopodiaceae 18 counties -
Atriplex truncata (Torr. ex S. Watson) A. Gray Native ATTRwedgescale saltbush · Chenopodiaceae 2 counties - Atriplex ×aptera A. Nelson (pro sp.) [canescens × nutallii] Native ATAPmoundscale · Chenopodiaceae 1 county
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Avena fatua L. Introduced AVFAwild oat · Poaceae 20 counties - Avena sativa L. Introduced AVSAcommon oat · Poaceae 5 counties
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Avenula hookeri (Scribn.) Holub Native AVHO3spikeoat · Poaceae 4 counties -
Axyris amaranthoides L. Introduced AXAMRussian pigweed · Chenopodiaceae 1 county -
Bacopa rotundifolia (Michx.) Wettst. Native BAROdisk waterhyssop · Scrophulariaceae 1 county -
Balsamorhiza incana Nutt. Native BAINhoary balsamroot · Asteraceae 10 counties -
Balsamorhiza macrophylla Nutt. Native BAMA4cutleaf balsamroot · Asteraceae 1 county -
Balsamorhiza sagittata (Pursh) Nutt. Native BASA3arrowleaf balsamroot · Asteraceae 31 counties -
Barbarea orthoceras Ledeb. Native BAORAmerican yellowrocket · Brassicaceae 8 counties -
Barbarea verna (Mill.) Asch. Introduced BAVEearly yellowrocket · Brassicaceae 1 county -
Barbarea vulgaris W.T. Aiton Introduced BAVUgarden yellowrocket · Brassicaceae 11 counties -
Bassia americana (S. Watson) A.J. Scott Native BAAM4green molly · Chenopodiaceae 1 county -
Bassia hyssopifolia (Pall.) Kuntz Introduced BAHYfivehorn smotherweed · Chenopodiaceae 9 counties -
Bassia scoparia (L.) A.J. Scott Introduced BASC5burningbush · Chenopodiaceae 50 counties -
Beckmannia syzigachne (Steud.) Fernald Native BESYAmerican sloughgrass · Poaceae 15 counties -
Bellis perennis L. Introduced BEPE2lawndaisy · Asteraceae 4 counties -
Berberis vulgaris L. Introduced BEVUcommon barberry · Berberidaceae 8 counties -
Bergia texana (Hook.) Seub. ex Walp. Native BETETexas bergia · Elatinaceae 1 county -
Berteroa incana (L.) DC. Introduced BEIN2hoary alyssum · Brassicaceae 25 counties -
Berula erecta (Huds.) Coville Native BEERcutleaf waterparsnip · Apiaceae 4 counties -
Besseya rubra (Douglas ex Hook.) Rydb. Native BERUred besseya · Scrophulariaceae 4 counties -
Besseya wyomingensis (A. Nelson) Rydb. Native BEWYWyoming besseya · Scrophulariaceae 42 counties -
Beta vulgaris L. Introduced BEVU2common beet · Chenopodiaceae 6 counties -
Betula nana L. Native BENAdwarf birch · Betulaceae 13 counties -
Betula occidentalis Hook. Native BEOC2water birch · Betulaceae 21 counties -
Betula papyrifera Marshall Native BEPApaper birch · Betulaceae 7 counties - Betula papyrifera Marshall var. papyrifera Native BEPAPpaper birch · Betulaceae 7 counties
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Bidens cernua L. Native BICEnodding beggartick · Asteraceae 19 counties -
Bidens tripartita L. Native BITRthreelobe beggarticks · Asteraceae 2 counties -
Bidens vulgata Greene Native BIVUbig devils beggartick · Asteraceae 7 counties -
Bolboschoenus fluviatilis (Torr.) Soják Native BOFL3river bulrush · Cyperaceae 3 counties -
Bolboschoenus maritimus (L.) Palla Native BOMA7cosmopolitan bulrush · Cyperaceae 14 counties -
Borago officinalis L. Introduced BOOFcommon borage · Boraginaceae 9 counties -
Botrychium hesperium (Maxon & R.T. Clausen) W.H. Wagner & Lellinger Native BOHE5western moonwort · Ophioglossaceae 1 county -
Botrychium lunaria (L.) Sw. Native BOLUcommon moonwort · Ophioglossaceae 1 county -
Botrychium multifidum (S.G. Gmel.) Trevis. Native BOMUleathery grapefern · Ophioglossaceae 1 county -
Botrychium simplex E. Hitchc. Native BOSIlittle grapefern · Ophioglossaceae 1 county -
Botrychium virginianum (L.) Sw. Native BOVIrattlesnake fern · Ophioglossaceae 2 counties -
Bouteloua curtipendula (Michx.) Torr. Native BOCUsideoats grama · Poaceae 10 counties - Bouteloua curtipendula (Michx.) Torr. var. curtipendula Native BOCUC2sideoats grama · Poaceae 10 counties
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Bouteloua dactyloides (Nutt.) J.T. Columbus Native BODA2buffalograss · Poaceae 7 counties -
Bouteloua gracilis (Willd. ex Kunth) Lag. ex Griffiths Native BOGR2blue grama · Poaceae 17 counties -
Boykinia major A. Gray Native BOMA3large boykinia · Saxifragaceae 1 county -
Brassica juncea (L.) Czern. Introduced BRJUbrown mustard · Brassicaceae 13 counties -
Brassica nigra (L.) W.D.J. Koch Introduced BRNIblack mustard · Brassicaceae 23 counties -
Brassica rapa L. Introduced BRRAfield mustard · Brassicaceae 13 counties - Brassica rapa L. var. rapa Introduced BRRARfield mustard · Brassicaceae 13 counties
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Brickellia eupatorioides (L.) Shinners Native BREUfalse boneset · Asteraceae 15 counties - Brickellia eupatorioides (L.) Shinners var. corymbulosa (Torr. & A. Gray) Shinners Native BREUCfalse boneset · Asteraceae 15 counties
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Brickellia grandiflora (Hook.) Nutt. Native BRGRtasselflower brickellbush · Asteraceae 9 counties -
Bromus arvensis L. Introduced BRAR5field brome · Poaceae 45 counties -
Bromus briziformis Fisch. & C.A. Mey. Introduced BRBR5rattlesnake brome · Poaceae 12 counties -
Bromus ciliatus L. Native BRCI2fringed brome · Poaceae 4 counties - Bromus ciliatus L. var. ciliatus Native BRCIC3fringed brome · Poaceae 1 county
- Bromus ciliatus L. var. richardsonii (Link) B. Boivin Native BRCIRfringed brome · Poaceae 1 county
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Bromus hordeaceus L. Introduced BRHO2soft brome · Poaceae 14 counties - Bromus hordeaceus L. ssp. hordeaceus Introduced BRHOHsoft brome · Poaceae 14 counties
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Bromus inermis Leyss. Both BRIN2smooth brome · Poaceae 21 counties - Bromus inermis Leyss. ssp. inermis Introduced BRINIsmooth brome · Poaceae 21 counties
- Bromus inermis Leyss. ssp. inermis var. inermis Introduced BRINI2smooth brome · Poaceae 21 counties
- Bromus inermis Leyss. ssp. pumpellianus (Scribn.) Wagnon Native BRINPPumpelly's brome · Poaceae 4 counties
- Bromus inermis Leyss. ssp. pumpellianus (Scribn.) Wagnon var. pumpellianus (Scribn.) C.L. Hitchc. Native BRINP5Pumpelly's brome · Poaceae 4 counties
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Bromus latiglumis (Shear) Hitchc. Native BRLA4earlyleaf brome · Poaceae 1 county -
Bromus marginatus Nees ex Steud. Native BRMA4mountain brome · Poaceae 2 counties -
Bromus porteri (J.M. Coult.) Nash Native BRPO2Porter brome · Poaceae 4 counties -
Bromus racemosus L. Introduced BRRA2bald brome · Poaceae 18 counties - Bromus secalinus L. Introduced BRSErye brome · Poaceae 9 counties
- Bromus secalinus L. var. secalinus Introduced BRSESrye brome · Poaceae 9 counties
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Bromus squarrosus L. Introduced BRSQ2corn brome · Poaceae 10 counties -
Bromus tectorum L. Introduced BRTEcheatgrass · Poaceae 51 counties -
Bromus vulgaris (Hook.) Shear Native BRVUColumbia brome · Poaceae 1 county -
Bryonia alba L. Introduced BRAL4white bryony · Cucurbitaceae 5 counties -
Buglossoides arvensis (L.) I.M. Johnst. Introduced BUAR3corn gromwell · Boraginaceae 28 counties -
Bupleurum americanum J.M. Coult. & Rose Native BUAM2American thorow wax · Apiaceae 20 counties -
Butomus umbellatus L. Introduced BUUMflowering rush · Butomaceae 2 counties -
Calamagrostis canadensis (Michx.) P. Beauv. Native CACA4bluejoint · Poaceae 4 counties - Calamagrostis canadensis (Michx.) P. Beauv. var. canadensis Native CACAC10bluejoint · Poaceae 1 county
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Calamagrostis koelerioides Vasey Native CAKOfire reedgrass · Poaceae 1 county -
Calamagrostis montanensis Scribn. ex Vasey Native CAMOplains reedgrass · Poaceae 3 counties -
Calamagrostis purpurascens R. Br. Native CAPUpurple reedgrass · Poaceae 3 counties - Calamagrostis purpurascens R. Br. var. purpurascens Native CAPUP7purple reedgrass · Poaceae 2 counties
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Calamagrostis rubescens Buckley Native CARUpinegrass · Poaceae 2 counties -
Calamagrostis scopulorum M.E. Jones Native CASCditch reedgrass · Poaceae 1 county -
Calamagrostis stricta (Timm) Koeler Native CAST36slimstem reedgrass · Poaceae 9 counties - Calamagrostis stricta (Timm) Koeler ssp. inexpansa (A. Gray) C.W. Greene Native CASTI3northern reedgrass · Poaceae 5 counties
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Calamovilfa longifolia (Hook.) Scribn. Native CALOprairie sandreed · Poaceae 8 counties - Calamovilfa longifolia (Hook.) Scribn. var. longifolia Native CALOL2prairie sandreed · Poaceae 8 counties
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Callitriche hermaphroditica L. Native CAHE2northern water-starwort · Callitrichaceae 12 counties -
Callitriche heterophylla Pursh Native CAHE3twoheaded water-starwort · Callitrichaceae 4 counties - Callitriche heterophylla Pursh ssp. heterophylla Native CAHEHtwoheaded water-starwort · Callitrichaceae 4 counties
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Callitriche palustris L. Native CAPA52vernal water-starwort · Callitrichaceae 12 counties - Callitriche stenoptera Lansdown Native CAST11narrow-wing water-starwort · Callitrichaceae 3 counties
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Calochortus eurycarpus S. Watson Native CAEUwhite mariposa lily · Liliaceae 9 counties -
Calochortus gunnisonii S. Watson Native CAGUGunnison's mariposa lily · Liliaceae 3 counties - Calochortus gunnisonii S. Watson var. gunnisonii Native CAGUGGunnison's mariposa lily · Liliaceae 3 counties
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Calochortus macrocarpus Douglas Native CAMA5sagebrush mariposa lily · Liliaceae 1 county - Calochortus macrocarpus Douglas var. macrocarpus Native CAMAM9sagebrush mariposa lily · Liliaceae 1 county
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Calochortus nuttallii Torr. & A. Gray Native CANU3sego lily · Liliaceae 32 counties -
Caltha leptosepala DC. Native CALE4white marsh marigold · Ranunculaceae 8 counties - Caltha leptosepala DC. ssp. leptosepala Native CALEL7white marsh marigold · Ranunculaceae 2 counties
- Caltha leptosepala DC. ssp. leptosepala var. leptosepala Native CALEL8white marsh marigold · Ranunculaceae 2 counties
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Calylophus serrulatus (Nutt.) P.H. Raven Native CASE12yellow sundrops · Onagraceae 21 counties -
Calypso bulbosa (L.) Oakes Native CABUfairy slipper · Orchidaceae 10 counties - Calypso bulbosa (L.) Oakes var. americana (R. Br.) Luer Native CABUAfairy slipper · Orchidaceae 10 counties
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Calystegia macounii (Greene) Brummitt Native CAMA23Macoun's false bindweed · Convolvulaceae 1 county -
Calystegia sepium (L.) R. Br. Both CASE13hedge false bindweed · Convolvulaceae 20 counties - Calystegia sepium (L.) R. Br. ssp. angulata Brummitt Native CASEA3hedge false bindweed · Convolvulaceae 20 counties
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Camassia quamash (Pursh) Greene Native CAQU2small camas · Liliaceae 9 counties - Camassia quamash (Pursh) Greene ssp. utahensis Gould Native CAQUU2Utah small camas · Liliaceae 1 county
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Camelina microcarpa Andrz. ex DC. Introduced CAMI2littlepod false flax · Brassicaceae 52 counties - Camelina sativa (L.) Crantz Introduced CASA2false flax · Brassicaceae 24 counties
- Camelina sativa (L.) Crantz ssp. sativa Introduced CASAS2gold-of-pleasure · Brassicaceae 23 counties
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Camissonia breviflora (Torr. & A. Gray) P.H. Raven Native CABR22fewflower evening primrose · Onagraceae 7 counties -
Camissonia scapoidea (Nutt. ex Torr. & A. Gray) P.H. Raven Native CASC18Paiute suncup · Onagraceae 2 counties - Camissonia scapoidea (Nutt. ex Torr. & A. Gray) P.H. Raven ssp. scapoidea Native CASCS3Paiute suncup · Onagraceae 2 counties
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Camissonia subacaulis (Pursh) P.H. Raven Native CASU18diffuseflower evening primrose · Onagraceae 7 counties -
Campanula glomerata L. Introduced CAGL2Dane's blood · Campanulaceae 11 counties -
Campanula medium L. Introduced CAME20Canterbury bells · Campanulaceae 1 county -
Campanula parryi A. Gray Native CAPA10Parry's bellflower · Campanulaceae 8 counties - Campanula parryi A. Gray var. idahoensis McVaugh Native CAPAI2Idaho bellflower · Campanulaceae 8 counties
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Campanula rapunculoides L. Introduced CARArampion bellflower · Campanulaceae 43 counties -
Campanula rotundifolia L. Native CARO2bluebell bellflower · Campanulaceae 51 counties -
Campanula scabrella Engelm. Native CASC6rough bellflower · Campanulaceae 2 counties -
Campanula uniflora L. Native CAUN2arctic bellflower · Campanulaceae 3 counties -
Canadanthus modestus (Lindl.) G.L. Nesom Native CAMO32giant mountain aster · Asteraceae 13 counties -
Cannabis sativa L. Introduced CASA3marijuana · Cannabaceae 8 counties - Cannabis sativa L. ssp. sativa Introduced CASAS3marijuana · Cannabaceae 8 counties
- Cannabis sativa L. ssp. sativa var. sativa Introduced CASAS9marijuana · Cannabaceae 8 counties
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Capsella bursa-pastoris (L.) Medik. Introduced CABU2shepherd's purse · Brassicaceae 54 counties -
Caragana arborescens Lam. Introduced CAAR18Siberian peashrub · Fabaceae 11 counties -
Cardamine breweri S. Watson Native CABR6Brewer's bittercress · Brassicaceae 10 counties -
Cardamine oligosperma Nutt. Native CAOLlittle western bittercress · Brassicaceae 3 counties -
Cardamine pensylvanica Muhl. ex Willd. Native CAPE3Pennsylvania bittercress · Brassicaceae 7 counties -
Cardaria chalepensis (L.) Hand.-Maz. Introduced CACH42lenspod whitetop · Brassicaceae 11 counties -
Cardaria draba (L.) Desv. Introduced CADRwhitetop · Brassicaceae 53 counties -
Cardaria pubescens (C.A. Mey.) Jarmolenko Introduced CAPU6hairy whitetop · Brassicaceae 9 counties -
Carduus acanthoides L. Introduced CAACspiny plumeless thistle · Asteraceae 6 counties -
Carduus nutans L. Introduced CANU4nodding plumeless thistle · Asteraceae 27 counties -
Carex albonigra Mack. Native CAAL6blackandwhite sedge · Cyperaceae 3 counties -
Carex aperta Boott Native CAAP3Columbian sedge · Cyperaceae 2 counties -
Carex aquatilis Wahlenb. Native CAAQwater sedge · Cyperaceae 11 counties - Carex aquatilis Wahlenb. var. aquatilis Native CAAQAwater sedge · Cyperaceae 11 counties
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Carex arapahoensis Clokey Native CAAR13Arapaho sedge · Cyperaceae 1 county -
Carex arcta Boott Native CAAR2northern cluster sedge · Cyperaceae 2 counties -
Carex atherodes Spreng. Native CAAT2wheat sedge · Cyperaceae 8 counties -
Carex athrostachya Olney Native CAAT3slenderbeak sedge · Cyperaceae 10 counties -
Carex aurea Nutt. Native CAAU3golden sedge · Cyperaceae 12 counties -
Carex backii Boott Native CABA3Back's sedge · Cyperaceae 2 counties -
Carex bebbii Olney ex Fernald Native CABE2Bebb's sedge · Cyperaceae 6 counties -
Carex bigelowii Torr. ex Schwein. Native CABI5Bigelow's sedge · Cyperaceae 2 counties -
Carex bolanderi Olney Native CABO2Bolander's sedge · Cyperaceae 1 county -
Carex brevior (Dewey) Mack. Native CABR10shortbeak sedge · Cyperaceae 16 counties -
Carex brunnescens (Pers.) Poir. Native CABR15brownish sedge · Cyperaceae 2 counties - Carex brunnescens (Pers.) Poir. ssp. sphaerostachya (Tuck.) Kalela Native CABRSbrownish sedge · Cyperaceae 2 counties
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Carex buxbaumii Wahlenb. Native CABU6Buxbaum's sedge · Cyperaceae 4 counties -
Carex canescens L. Native CACA11silvery sedge · Cyperaceae 6 counties - Carex canescens L. ssp. canescens Native CACAC6silvery sedge · Cyperaceae 6 counties
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Carex capillaris L. Native CACA12hair-like sedge · Cyperaceae 5 counties -
Carex capitata L. Native CACA13capitate sedge · Cyperaceae 1 county - Carex capitata L. ssp. arctogena (Harry Sm.) Hiitonen Native CACAA2capitate sedge · Cyperaceae 1 county
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Carex concinna R. Br. Native CACO10low northern sedge · Cyperaceae 3 counties -
Carex concinnoides Mack. Native CACO11northwestern sedge · Cyperaceae 2 counties -
Carex crawei Dewey Native CACR3Crawe's sedge · Cyperaceae 1 county -
Carex cusickii Mack. ex Piper & Beattie Native CACU5Cusick's sedge · Cyperaceae 2 counties -
Carex deweyana Schwein. Native CADE9Dewey sedge · Cyperaceae 2 counties - Carex deweyana Schwein. var. deweyana Native CADED4Dewey sedge · Cyperaceae 2 counties
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Carex diandra Schrank Native CADI4lesser panicled sedge · Cyperaceae 5 counties -
Carex disperma Dewey Native CADI6softleaf sedge · Cyperaceae 7 counties -
Carex douglasii Boott Native CADO2Douglas' sedge · Cyperaceae 16 counties -
Carex duriuscula C.A. Mey. Native CADU6needleleaf sedge · Cyperaceae 29 counties -
Carex echinata Murray Native CAECstar sedge · Cyperaceae 2 counties - Carex echinata Murray ssp. echinata Native CAECEstar sedge · Cyperaceae 2 counties
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Carex elynoides T. Holm Native CAEL3blackroot sedge · Cyperaceae 2 counties -
Carex engelmannii L.H. Bailey Native CAEN3Engelmann's sedge · Cyperaceae 4 counties -
Carex filifolia Nutt. Native CAFIthreadleaf sedge · Cyperaceae 42 counties -
Carex flava L. Native CAFL4yellow sedge · Cyperaceae 4 counties -
Carex geyeri Boott Native CAGE2Geyer's sedge · Cyperaceae 9 counties -
Carex glacialis Mack. Native CAGL3glacial sedge · Cyperaceae 1 county -
Carex gravida L.H. Bailey Native CAGR4heavy sedge · Cyperaceae 2 counties - Carex gravida L.H. Bailey var. gravida Native CAGRG2heavy sedge · Cyperaceae 2 counties
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Carex gynocrates Wormsk. ex Drejer Native CAGY2northern bog sedge · Cyperaceae 3 counties -
Carex haydeniana Olney Native CAHA6cloud sedge · Cyperaceae 3 counties -
Carex heteroneura W. Boott Native CAHE8different-nerve sedge · Cyperaceae 2 counties - Carex heteroneura W. Boott var. chalciolepis (T. Holm) F.J. Herm. Native CAHECHolm sedge · Cyperaceae 1 county
- Carex heteroneura W. Boott var. epapillosa (Mack.) F.J. Herm. Native CAHEEdifferent-nerve sedge · Cyperaceae 2 counties
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Carex hoodii Boott Native CAHO5Hood's sedge · Cyperaceae 12 counties -
Carex hystericina Muhl. ex Willd. Native CAHY4bottlebrush sedge · Cyperaceae 1 county -
Carex idahoa L.H. Bailey Native CAIDIdaho sedge · Cyperaceae 1 county -
Carex illota L.H. Bailey Native CAILsheep sedge · Cyperaceae 4 counties -
Carex incurviformis Mack. Native CAIN8coastal sand sedge · Cyperaceae 1 county - Carex incurviformis Mack. var. danaensis (Stacey) F.J. Herm. Native CAINDcoastal sand sedge · Cyperaceae 1 county
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Carex infirminervia Naczi Native CAIN7weak-nerved sedge · Cyperaceae 5 counties -
Carex inops L.H. Bailey Native CAIN9long-stolon sedge · Cyperaceae 14 counties - Carex inops L.H. Bailey ssp. heliophila (Mack.) Crins Native CAINH2sun sedge · Cyperaceae 14 counties
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Carex interior L.H. Bailey Native CAIN11inland sedge · Cyperaceae 4 counties -
Carex lachenalii Schkuhr Native CALA10twotipped sedge · Cyperaceae 1 county -
Carex laeviconica Dewey Native CALA12smoothcone sedge · Cyperaceae 3 counties -
Carex laeviculmis Meinsh. Native CALA13smoothstem sedge · Cyperaceae 5 counties -
Carex lasiocarpa Ehrh. Native CALA11woollyfruit sedge · Cyperaceae 4 counties - Carex lasiocarpa Ehrh. var. americana Fernald Native CALAAAmerican woollyfruit sedge · Cyperaceae 3 counties
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Carex lenticularis Michx. Native CALE8lakeshore sedge · Cyperaceae 9 counties - Carex lenticularis Michx. var. dolia (M.E. Jones) L.A. Standl. Native CALEDEnander's sedge · Cyperaceae 1 county
- Carex lenticularis Michx. var. lipocarpa (T. Holm) L.A. Standl. Native CALEL3Kellogg's sedge · Cyperaceae 9 counties
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Carex leporinella Mack. Native CALE9Sierra hare sedge · Cyperaceae 2 counties -
Carex leptalea Wahlenb. Native CALE10bristlystalked sedge · Cyperaceae 4 counties - Carex leptalea Wahlenb. ssp. leptalea Native CALEL4bristlystalked sedge · Cyperaceae 4 counties
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Carex limosa L. Native CALI7mud sedge · Cyperaceae 3 counties -
Carex livida (Wahlenb.) Willd. Native CALIlivid sedge · Cyperaceae 1 county - Carex livida (Wahlenb.) Willd. var. radicaulis Paine Native CALIRlivid sedge · Cyperaceae 1 county
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Carex luzulina Olney Native CALU7woodrush sedge · Cyperaceae 2 counties - Carex luzulina Olney var. ablata (L.H. Bailey) F.J. Herm. Native CALUAwoodrush sedge · Cyperaceae 1 county
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Carex mertensii Prescott ex Bong. Native CAME6Mertens' sedge · Cyperaceae 4 counties -
Carex microglochin Wahlenb. Native CAMI6fewseeded bog sedge · Cyperaceae 1 county -
Carex microptera Mack. Native CAMI7smallwing sedge · Cyperaceae 14 counties -
Carex misandra R. Br. Native CAMI10shortleaved sedge · Cyperaceae 1 county -
Carex nardina Fr. Native CANA2spike sedge · Cyperaceae 2 counties - Carex nardina Fr. var. hepburnii (Boott) Kük. Native CANAHHepburn's sedge · Cyperaceae 2 counties
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Carex nebrascensis Dewey Native CANE2Nebraska sedge · Cyperaceae 20 counties -
Carex nelsonii Mack. Native CANE3Nelson's sedge · Cyperaceae 1 county -
Carex neurophora Mack. Native CANE6alpine nerve sedge · Cyperaceae 2 counties -
Carex nigricans C.A. Mey. Native CANI2black alpine sedge · Cyperaceae 5 counties -
Carex norvegica Retz. Native CANO2Norway sedge · Cyperaceae 2 counties - Carex norvegica Retz. ssp. stevenii (T. Holm) A.E. Murray Native CANOSSteven's sedge · Cyperaceae 2 counties
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Carex nova L.H. Bailey Native CANO3black sedge · Cyperaceae 1 county -
Carex obtusata Lilj. Native CAOB4obtuse sedge · Cyperaceae 3 counties -
Carex occidentalis L.H. Bailey Native CAOC2western sedge · Cyperaceae 1 county -
Carex pachystachya Cham. ex Steud. Native CAPA14chamisso sedge · Cyperaceae 6 counties -
Carex paysonis Clokey Native CAPA31Payson's sedge · Cyperaceae 2 counties -
Carex pellita Muhl. ex Willd. Native CAPE42woolly sedge · Cyperaceae 25 counties -
Carex pelocarpa F.J. Herm. Native CAPE5duskyseed sedge · Cyperaceae 2 counties -
Carex petasata Dewey Native CAPE7Liddon sedge · Cyperaceae 9 counties -
Carex phaeocephala Piper Native CAPH2dunhead sedge · Cyperaceae 6 counties -
Carex platylepis Mack. Native CAPL8broadscale sedge · Cyperaceae 1 county -
Carex praeceptorum Mack. Native CAPR22early sedge · Cyperaceae 1 county -
Carex praegracilis W. Boott Native CAPR5clustered field sedge · Cyperaceae 16 counties - Carex praticola Rydb. Native CAPR7meadow sedge · Cyperaceae 7 counties
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Carex pyrenaica Wahlenb. Native CAPY3Pyrenean sedge · Cyperaceae 6 counties - Carex pyrenaica Wahlenb. ssp. pyrenaica Native CAPYPPyrenean sedge · Cyperaceae 6 counties
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Carex raynoldsii Dewey Native CARA6Raynolds' sedge · Cyperaceae 11 counties -
Carex retrorsa Schwein. Native CARE4knotsheath sedge · Cyperaceae 4 counties - Carex rossii Boott Native CARO5Ross' sedge · Cyperaceae 13 counties
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Carex rostrata Stokes Native CARO6beaked sedge · Cyperaceae 12 counties -
Carex rupestris All. Native CARU3curly sedge · Cyperaceae 1 county - Carex rupestris All. var. drummondiana (Dewey) L.H. Bailey Native CARUDDrummond's sedge · Cyperaceae 1 county
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Carex sartwellii Dewey Native CASA8Sartwell's sedge · Cyperaceae 5 counties - Carex sartwellii Dewey var. sartwellii Native CASAS5Sartwell's sedge · Cyperaceae 5 counties
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Carex scirpoidea Michx. Native CASC10northern singlespike sedge · Cyperaceae 4 counties - Carex scirpoidea Michx. ssp. pseudoscirpoidea (Rydb.) Dunlop Native CASCP3western singlespike sedge · Cyperaceae 1 county
- Carex scirpoidea Michx. ssp. scirpoidea Native CASCS8northern singlespike sedge · Cyperaceae 1 county
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Carex scoparia Schkuhr ex Willd. Native CASC11broom sedge · Cyperaceae 1 county - Carex scoparia Schkuhr ex Willd. var. scoparia Native CASCSbroom sedge · Cyperaceae 1 county
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Carex scopulorum T. Holm Native CASC12mountain sedge · Cyperaceae 2 counties - Carex scopulorum T. Holm var. scopulorum Native CASCS2mountain sedge · Cyperaceae 2 counties
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Carex siccata Dewey Native CASI12dryspike sedge · Cyperaceae 4 counties -
Carex simulata Mack. Native CASI2analogue sedge · Cyperaceae 4 counties -
Carex spectabilis Dewey Native CASP5showy sedge · Cyperaceae 6 counties -
Carex sprengelii Dewey ex Spreng. Native CASP7Sprengel's sedge · Cyperaceae 12 counties -
Carex stenoptila F.J. Herm. Native CAST4riverbank sedge · Cyperaceae 2 counties -
Carex sterilis Willd. Native CAST16dioecious sedge · Cyperaceae 2 counties -
Carex stipata Muhl. ex Willd. Native CAST5awlfruit sedge · Cyperaceae 8 counties - Carex stipata Muhl. ex Willd. var. stipata Native CASTS3owlfruit sedge · Cyperaceae 8 counties
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Carex straminiformis L.H. Bailey Native CAST7Shasta sedge · Cyperaceae 2 counties -
Carex subnigricans Stacey Native CASU7nearlyblack sedge · Cyperaceae 1 county - Carex utriculata Boott Native CAUTNorthwest Territory sedge · Cyperaceae 2 counties
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Carex vallicola Dewey Native CAVA3valley sedge · Cyperaceae 2 counties - Carex vallicola Dewey var. vallicola Native CAVAVvalley sedge · Cyperaceae 2 counties
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Carex viridula Michx. Native CAVI5little green sedge · Cyperaceae 6 counties - Carex viridula Michx. ssp. viridula Native CAVIVlittle green sedge · Cyperaceae 6 counties
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Carex vulpinoidea Michx. Native CAVU2fox sedge · Cyperaceae 2 counties - Carex vulpinoidea Michx. var. vulpinoidea Native CAVUVfox sedge · Cyperaceae 2 counties
- Carex ×physocarpoides Lepage Native CAPH3sedge · Cyperaceae 3 counties
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Carthamus tinctorius L. Introduced CATIsafflower · Asteraceae 3 counties -
Carum carvi L. Introduced CACA19caraway · Apiaceae 17 counties -
Cassiope mertensiana (Bong.) G. Don Native CAME7western moss heather · Ericaceae 7 counties - Cassiope mertensiana (Bong.) G. Don var. gracilis (Piper) C.L. Hitchc. Native CAMEGwestern moss heather · Ericaceae 7 counties
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Cassiope tetragona (L.) D. Don Native CATE11white arctic mountain heather · Ericaceae 2 counties - Cassiope tetragona (L.) D. Don var. saximontana (Small) C.L. Hitchc. Native CATES2white arctic mountain heather · Ericaceae 2 counties
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Castilleja angustifolia (Nutt.) G. Don Native CAAN7northwestern Indian paintbrush · Scrophulariaceae 4 counties - Castilleja angustifolia (Nutt.) G. Don var. angustifolia Native CAANA3northwestern Indian paintbrush · Scrophulariaceae 4 counties
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Castilleja applegatei Fernald Native CAAP4wavyleaf Indian paintbrush · Scrophulariaceae 2 counties -
Castilleja cervina Greenm. Native CACE4deer Indian paintbrush · Scrophulariaceae 3 counties -
Castilleja crista-galli Rydb. Native CACR13mountainside Indian paintbrush · Scrophulariaceae 1 county -
Castilleja cusickii Greenm. Native CACU7Cusick's Indian paintbrush · Scrophulariaceae 8 counties -
Castilleja flava S. Watson Native CAFL7yellow Indian paintbrush · Scrophulariaceae 6 counties - Castilleja flava S. Watson var. flava Native CAFLF3yellow Indian paintbrush · Scrophulariaceae 2 counties
- Castilleja flava S. Watson var. rustica (Piper) N.H. Holmgren Native CAFLRcountry Indian paintbrush · Scrophulariaceae 1 county
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Castilleja hispida Benth. Native CAHI9harsh Indian paintbrush · Scrophulariaceae 3 counties -
Castilleja kerryana J.M. Egger Native CAKE7Kerry's Indian paintbrush · Scrophulariaceae 1 county -
Castilleja linariifolia Benth. Native CALI4Wyoming Indian paintbrush · Scrophulariaceae 10 counties -
Castilleja lutescens (Greenm.) Rydb. Native CALU14stiff yellow Indian paintbrush · Scrophulariaceae 13 counties -
Castilleja miniata Douglas ex Hook. Native CAMI12giant red Indian paintbrush · Scrophulariaceae 20 counties - Castilleja miniata Douglas ex Hook. ssp. miniata Native CAMIM5giant red Indian paintbrush · Scrophulariaceae 20 counties
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Castilleja minor (A. Gray) A. Gray Native CAMI13lesser Indian paintbrush · Scrophulariaceae 1 county - Castilleja minor (A. Gray) A. Gray ssp. minor Native CAMIM6lesser Indian paintbrush · Scrophulariaceae 1 county
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Castilleja nivea Pennell & Ownbey Native CANI8snow Indian paintbrush · Scrophulariaceae 2 counties -
Castilleja pallescens (A. Gray) Greenm. Native CAPA25pale Indian paintbrush · Scrophulariaceae 11 counties - Castilleja pallescens (A. Gray) Greenm. var. pallescens Native CAPAP7pale Indian paintbrush · Scrophulariaceae 11 counties
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Castilleja pilosa (S. Watson) Rydb. Native CAPI3parrothead Indian paintbrush · Scrophulariaceae 2 counties - Castilleja pilosa (S. Watson) Rydb. var. longispica (A. Nelson) N.H. Holmgren Native CAPILlongspike Indian paintbrush · Scrophulariaceae 2 counties
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Castilleja pulchella Rydb. Native CAPU10beautiful Indian paintbrush · Scrophulariaceae 6 counties -
Castilleja rhexiifolia Rydb. Native CARH4splitleaf Indian paintbrush · Scrophulariaceae 12 counties -
Castilleja sessiliflora Pursh Native CASE5downy paintedcup · Scrophulariaceae 26 counties -
Castilleja sulphurea Rydb. Native CASU12sulphur Indian paintbrush · Scrophulariaceae 3 counties -
Catabrosa aquatica (L.) P. Beauv. Native CAAQ3water whorlgrass · Poaceae 8 counties - Catabrosa aquatica (L.) P. Beauv. var. aquatica Native CAAQA6water whorlgrass · Poaceae 8 counties
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Ceanothus herbaceus Raf. Native CEHEJersey tea · Rhamnaceae 1 county -
Ceanothus sanguineus Pursh Native CESAredstem ceanothus · Rhamnaceae 4 counties -
Ceanothus velutinus Douglas ex Hook. Native CEVEsnowbrush ceanothus · Rhamnaceae 14 counties - Ceanothus velutinus Douglas ex Hook. var. velutinus Native CEVEV4snowbrush ceanothus · Rhamnaceae 14 counties
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Celastrus scandens L. Native CESCAmerican bittersweet · Celastraceae 1 county -
Celtis occidentalis L. Native CEOCcommon hackberry · Ulmaceae 1 county -
Cenchrus longispinus (Hack.) Fernald Native CELO3mat sandbur · Poaceae 1 county -
Centaurea cyanus L. Introduced CECY2garden cornflower · Asteraceae 5 counties -
Centaurea diffusa Lam. Introduced CEDI3diffuse knapweed · Asteraceae 39 counties -
Centaurea jacea L. Introduced CEJAbrownray knapweed · Asteraceae 3 counties -
Centaurea macrocephala Puschk. ex Willd. Introduced CEMA9bighead knapweed · Asteraceae 1 county -
Centaurea montana L. Introduced CEMOperennial cornflower · Asteraceae 2 counties -
Centaurea nigra L. Introduced CENI2lesser knapweed · Asteraceae 5 counties -
Centaurea nigrescens Willd. Introduced CENI3Tyrol knapweed · Asteraceae 3 counties -
Centaurea scabiosa L. Introduced CESC2greater knapweed · Asteraceae 2 counties -
Centaurea solstitialis L. Introduced CESO3yellow star-thistle · Asteraceae 6 counties -
Centaurea stoebe L. Introduced CEST8spotted knapweed · Asteraceae 56 counties - Centaurea stoebe L. ssp. micranthos (Gugler) Hayek Introduced CESTMspotted knapweed · Asteraceae 56 counties
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Centaurium exaltatum (Griseb.) W. Wight ex Piper Native CEEXdesert centaury · Gentianaceae 2 counties -
Cerastium arvense L. Both CEAR4field chickweed · Caryophyllaceae 51 counties - Cerastium arvense L. ssp. strictum (L.) Ugborogho Native CEARS2field chickweed · Caryophyllaceae 51 counties
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Cerastium beeringianum Cham. & Schltdl. Native CEBE2Bering chickweed · Caryophyllaceae 7 counties - Cerastium beeringianum Cham. & Schltdl. ssp. earlei (Rydb.) Hultén Native CEBEEBering chickweed · Caryophyllaceae 7 counties
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Cerastium brachypodum (Engelm. ex A. Gray) B.L. Rob. Native CEBR3shortstalk chickweed · Caryophyllaceae 2 counties -
Cerastium fontanum Baumg. Introduced CEFO2common mouse-ear chickweed · Caryophyllaceae 38 counties - Cerastium fontanum Baumg. ssp. vulgare (Hartm.) Greuter & Burdet Introduced CEFOV2big chickweed · Caryophyllaceae 38 counties
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Cerastium glomeratum Thuill. Introduced CEGL2sticky chickweed · Caryophyllaceae 5 counties -
Cerastium nutans Raf. Native CENU2nodding chickweed · Caryophyllaceae 3 counties - Cerastium nutans Raf. var. nutans Native CENUNnodding chickweed · Caryophyllaceae 3 counties
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Ceratocephala testiculata (Crantz) Roth Introduced CETE5curveseed butterwort · Ranunculaceae 16 counties -
Ceratophyllum demersum L. Native CEDE4coon's tail · Ceratophyllaceae 7 counties -
Cercocarpus ledifolius Nutt. Native CELE3curl-leaf mountain mahogany · Rosaceae 11 counties - Cercocarpus ledifolius Nutt. var. intercedens C.K. Schneid. Native CELEIcurl-leaf mountain mahogany · Rosaceae 1 county
- Cercocarpus ledifolius Nutt. var. ledifolius Native CELELcurl-leaf mountain mahogany · Rosaceae 1 county
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Chaenactis douglasii (Hook.) Hook. & Arn. Native CHDODouglas' dustymaiden · Asteraceae 28 counties - Chaenactis douglasii (Hook.) Hook. & Arn. var. alpina A. Gray Native CHDOA2alpine dustymaiden · Asteraceae 4 counties
- Chaenactis douglasii (Hook.) Hook. & Arn. var. douglasii Native CHDODDouglas' dustymaiden · Asteraceae 3 counties
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Chaenorhinum minus (L.) Lange Introduced CHMIdwarf snapdragon · Scrophulariaceae 3 counties -
Chamaerhodos erecta (L.) Bunge Native CHERlittle rose · Rosaceae 20 counties - Chamaerhodos erecta (L.) Bunge ssp. nuttallii (Pickering ex Rydb.) Hultén Native CHERNNuttall's little rose · Rosaceae 20 counties
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Chamaesyce geyeri (Engelm. & A. Gray) Small Native CHGE2Geyer's sandmat · Euphorbiaceae 1 county - Chamaesyce geyeri (Engelm. & A. Gray) Small var. geyeri Native CHGEGGeyer's sandmat · Euphorbiaceae 1 county
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Chamaesyce glyptosperma (Engelm.) Small Native CHGL13ribseed sandmat · Euphorbiaceae 33 counties -
Chamaesyce missurica (Raf.) Shinners Native CHMI8prairie sandmat · Euphorbiaceae 3 counties -
Chamaesyce serpens (Kunth) Small Native CHSE4matted sandmat · Euphorbiaceae 12 counties -
Chamaesyce serpyllifolia (Pers.) Small Native CHSE6thymeleaf sandmat · Euphorbiaceae 6 counties - Chamaesyce serpyllifolia (Pers.) Small ssp. serpyllifolia Native CHSESthymeleaf sandmat · Euphorbiaceae 4 counties
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Chamerion angustifolium (L.) Holub Native CHAN9fireweed · Onagraceae 36 counties - Chamerion angustifolium (L.) Holub ssp. angustifolium Native CHANA2fireweed · Onagraceae 35 counties
- Chamerion angustifolium (L.) Holub ssp. circumvagum (Mosquin) Hoch Native CHANCfireweed · Onagraceae 4 counties
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Chamerion latifolium (L.) Holub Native CHLA13dwarf fireweed · Onagraceae 2 counties -
Cheilanthes feei T. Moore Native CHFEslender lipfern · Pteridaceae 4 counties -
Chelidonium majus L. Introduced CHMA2celandine · Papaveraceae 1 county - Chelidonium majus L. var. majus Introduced CHMAMcelandine · Papaveraceae 1 county
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Chenopodium album L. Both CHAL7lambsquarters · Chenopodiaceae 51 counties - Chenopodium album L. var. album Introduced CHALAlambsquarters · Chenopodiaceae 50 counties
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Chenopodium atrovirens Rydb. Native CHATpinyon goosefoot · Chenopodiaceae 2 counties -
Chenopodium berlandieri Moq. Native CHBE4pitseed goosefoot · Chenopodiaceae 6 counties - Chenopodium berlandieri Moq. var. zschackii (Murr) Murr ex Asch. Native CHBEZZschack's goosefoot · Chenopodiaceae 4 counties
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Chenopodium capitatum (L.) Asch. Native CHCA4blite goosefoot · Chenopodiaceae 7 counties -
Chenopodium chenopodioides (L.) Aellen Native CHCHlow goosefoot · Chenopodiaceae 2 counties -
Chenopodium desiccatum A. Nelson Native CHDEaridland goosefoot · Chenopodiaceae 6 counties -
Chenopodium fremontii S. Watson Native CHFR3Fremont's goosefoot · Chenopodiaceae 8 counties - Chenopodium fremontii S. Watson var. fremontii Native CHFRFFremont's goosefoot · Chenopodiaceae 5 counties
- Chenopodium fremontii S. Watson var. pringlei (Standl.) Aellen Native CHFRPPringle's goosefoot · Chenopodiaceae 1 county
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Chenopodium glaucum L. Introduced CHGL3oakleaf goosefoot · Chenopodiaceae 26 counties -
Chenopodium leptophyllum (Moq.) Nutt. ex S. Watson Native CHLE4narrowleaf goosefoot · Chenopodiaceae 8 counties -
Chenopodium murale L. Introduced CHMU2nettleleaf goosefoot · Chenopodiaceae 4 counties - Chenopodium overi Aellen Native CHOVOver's goosefoot · Chenopodiaceae 2 counties
- Chenopodium pratericola Rydb. Native CHPR5desert goosefoot · Chenopodiaceae 4 counties
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Chenopodium rubrum L. Native CHRUred goosefoot · Chenopodiaceae 5 counties -
Chenopodium salinum Standl. Native CHSA2Rocky Mountain goosefoot · Chenopodiaceae 4 counties -
Chenopodium simplex (Torr.) Raf. Native CHSI2mapleleaf goosefoot · Chenopodiaceae 17 counties -
Chenopodium standleyanum Aellen Native CHST2Standley's goosefoot · Chenopodiaceae 1 county -
Chenopodium subglabrum (S. Watson) A. Nelson Native CHSU2smooth goosefoot · Chenopodiaceae 1 county -
Chimaphila umbellata (L.) W.P.C. Barton Native CHUMpipsissewa · Pyrolaceae 21 counties - Chimaphila umbellata (L.) W.P.C. Barton ssp. occidentalis (Rydb.) Hultén Native CHUMO2pipsissewa · Pyrolaceae 21 counties
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Chionophila tweedyi (Canby & Rose) L.F. Hend. Native CHTWTweedy's snowlover · Scrophulariaceae 4 counties -
Chondrilla juncea L. Introduced CHJUrush skeletonweed · Asteraceae 4 counties -
Chorispora tenella (Pall.) DC. Introduced CHTE2crossflower · Brassicaceae 36 counties -
Chrysothamnus linifolius Greene Native CHLI3spearleaf rabbitbrush · Asteraceae 1 county -
Chrysothamnus viscidiflorus (Hook.) Nutt. Native CHVI8yellow rabbitbrush · Asteraceae 20 counties - Chrysothamnus viscidiflorus (Hook.) Nutt. ssp. lanceolatus (Nutt.) H.M. Hall & Clem. Native CHVIL4yellow rabbitbrush · Asteraceae 2 counties
- Chrysothamnus viscidiflorus (Hook.) Nutt. ssp. viscidiflorus Native CHVIV2yellow rabbitbrush · Asteraceae 2 counties
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Cichorium intybus L. Introduced CIINchicory · Asteraceae 29 counties -
Cicuta bulbifera L. Native CIBUbulblet-bearing water hemlock · Apiaceae 1 county -
Cicuta douglasii (DC.) J.M. Coult. & Rose Native CIDOwestern water hemlock · Apiaceae 26 counties -
Cicuta maculata L. Native CIMA2spotted water hemlock · Apiaceae 9 counties - Cicuta maculata L. var. angustifolia Hook. Native CIMAAspotted water hemlock · Apiaceae 8 counties
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Cinna arundinacea L. Native CIAR2sweet woodreed · Poaceae 1 county -
Cinna latifolia (Trevis. ex Goepp.) Griseb. Native CILA2drooping woodreed · Poaceae 5 counties -
Circaea alpina L. Native CIALsmall enchanter's nightshade · Onagraceae 11 counties - Circaea alpina L. ssp. alpina Native CIALAsmall enchanter's nightshade · Onagraceae 2 counties
- Circaea alpina L. ssp. pacifica (Asch. & Magnus) P.H. Raven Native CIALP2small enchanter's nightshade · Onagraceae 1 county
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Cirsium arvense (L.) Scop. Introduced CIAR4Canada thistle · Asteraceae 56 counties -
Cirsium canescens Nutt. Native CICA11prairie thistle · Asteraceae 5 counties - Cirsium canovirens (Rydb.) Petr. Native CICA6graygreen thistle · Asteraceae 4 counties
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Cirsium eatonii (A. Gray) B.L. Rob. Native CIEAEaton's thistle · Asteraceae 5 counties -
Cirsium flodmanii (Rydb.) Arthur Native CIFLFlodman's thistle · Asteraceae 20 counties -
Cirsium foliosum (Hook.) DC. Native CIFOelk thistle · Asteraceae 8 counties -
Cirsium hookerianum Nutt. Native CIHOwhite thistle · Asteraceae 12 counties -
Cirsium ochrocentrum A. Gray Native CIOC2yellowspine thistle · Asteraceae 1 county - Cirsium ochrocentrum A. Gray ssp. ochrocentrum Native CIOCO2yellowspine thistle · Asteraceae 1 county
- Cirsium scariosum Nutt. Native CISC2meadow thistle · Asteraceae 2 counties
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Cirsium subniveum Rydb. Native CISUJackson Hole thistle · Asteraceae 2 counties -
Cirsium undulatum (Nutt.) Spreng. Native CIUNwavyleaf thistle · Asteraceae 48 counties - Cirsium undulatum (Nutt.) Spreng. var. undulatum Native CIUNUwavyleaf thistle · Asteraceae 48 counties
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Cirsium vulgare (Savi) Ten. Introduced CIVUbull thistle · Asteraceae 37 counties -
Cistanthe umbellata (Torr.) Hershkovitz Native CIUMMt. Hood pussypaws · Portulacaceae 5 counties - Cistanthe umbellata (Torr.) Hershkovitz var. caudicifera (A. Gray) Kartesz & Gandhi Native CIUMCMt. Hood pussypaws · Portulacaceae 2 counties
- Cistanthe umbellata (Torr.) Hershkovitz var. umbellata Native CIUMUMt. Hood pussypaws · Portulacaceae 3 counties
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Clarkia pulchella Pursh Native CLPUpinkfairies · Onagraceae 8 counties -
Claytonia cordifolia S. Watson Native CLCO3heartleaf springbeauty · Portulacaceae 2 counties -
Claytonia lanceolata Pall. ex Pursh Native CLLA2lanceleaf springbeauty · Portulacaceae 24 counties - Claytonia lanceolata Pall. ex Pursh var. lanceolata Native CLLALlanceleaf springbeauty · Portulacaceae 2 counties
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Claytonia megarhiza (A. Gray) Parry ex S. Watson Native CLMEalpine springbeauty · Portulacaceae 3 counties - Claytonia megarhiza (A. Gray) Parry ex S. Watson var. megarhiza Native CLMEMalpine springbeauty · Portulacaceae 3 counties
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Claytonia perfoliata Donn ex Willd. Native CLPEminer's lettuce · Portulacaceae 8 counties - Claytonia perfoliata Donn ex Willd. ssp. perfoliata Native CLPEPminer's lettuce · Portulacaceae 8 counties
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Claytonia sibirica L. Native CLSI2Siberian springbeauty · Portulacaceae 2 counties - Claytonia sibirica L. var. sibirica Native CLSISSiberian springbeauty · Portulacaceae 2 counties
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Clematis columbiana (Nutt.) Torr. & A. Gray Native CLCO2rock clematis · Ranunculaceae 21 counties - Clematis columbiana (Nutt.) Torr. & A. Gray var. columbiana Native CLCOC2rock clematis · Ranunculaceae 8 counties
- Clematis columbiana (Nutt.) Torr. & A. Gray var. tenuiloba (A. Gray) J. Pringle Native CLCOTrock clematis · Ranunculaceae 2 counties
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Clematis hirsutissima Pursh Native CLHIhairy clematis · Ranunculaceae 18 counties - Clematis hirsutissima Pursh var. hirsutissima Native CLHIHhairy clematis · Ranunculaceae 18 counties
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Clematis ligusticifolia Nutt. Native CLLI2western white clematis · Ranunculaceae 32 counties - Clematis ligusticifolia Nutt. var. ligusticifolia Native CLLIL2western white clematis · Ranunculaceae 30 counties
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Clematis occidentalis (Hornem.) DC. Native CLOC2western blue virginsbower · Ranunculaceae 3 counties - Clematis occidentalis (Hornem.) DC. var. grosseserrata (Rydb.) J. Pringle Native CLOCGwestern blue virginsbower · Ranunculaceae 3 counties
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Cleome lutea Hook. Native CLLU2yellow spiderflower · Capparaceae 1 county - Cleome lutea Hook. var. lutea Native CLLULyellow spiderflower · Capparaceae 1 county
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Cleome serrulata Pursh Native CLSERocky Mountain beeplant · Capparaceae 34 counties -
Clintonia uniflora (Menzies ex Schult. & Schult. f.) Kunth Native CLUN2bride's bonnet · Liliaceae 10 counties -
Collinsia parviflora Lindl. Native COPA3maiden blue eyed Mary · Scrophulariaceae 18 counties -
Collomia debilis (S. Watson) Greene Native CODEalpine collomia · Polemoniaceae 4 counties - Collomia debilis (S. Watson) Greene var. debilis Native CODEDalpine collomia · Polemoniaceae 1 county
- Collomia debilis (S. Watson) Greene var. trifida Payson Native CODETalpine collomia · Polemoniaceae 2 counties
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Collomia grandiflora Douglas ex Lindl. Native COGR4grand collomia · Polemoniaceae 1 county -
Collomia linearis Nutt. Native COLI2tiny trumpet · Polemoniaceae 44 counties -
Collomia tenella A. Gray Native COTEdiffuse collomia · Polemoniaceae 1 county -
Collomia tinctoria Kellogg Native COTI2staining collomia · Polemoniaceae 2 counties -
Comandra umbellata (L.) Nutt. Native COUMbastard toadflax · Santalaceae 47 counties - Comandra umbellata (L.) Nutt. ssp. pallida (A. DC.) Piehl Native COUMPpale bastard toadflax · Santalaceae 47 counties
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Comarum palustre L. Native COPA28purple marshlocks · Rosaceae 4 counties -
Conimitella williamsii (D.C. Eaton) Rydb. Native COWIWilliams' miterwort · Saxifragaceae 7 counties -
Conium maculatum L. Introduced COMA2poison hemlock · Apiaceae 33 counties -
Conringia orientalis (L.) Dumort. Introduced COORhare's ear mustard · Brassicaceae 36 counties -
Consolida ajacis (L.) Schur Introduced COAJdoubtful knight's-spur · Ranunculaceae 5 counties -
Convallaria majalis L. Introduced COMA7European lily of the valley · Liliaceae 1 county -
Convolvulus arvensis L. Introduced COAR4field bindweed · Convolvulaceae 56 counties -
Conyza canadensis (L.) Cronquist Native COCA5Canadian horseweed · Asteraceae 30 counties - Conyza canadensis (L.) Cronquist var. canadensis Native COCAC3Canadian horseweed · Asteraceae 24 counties
- Conyza canadensis (L.) Cronquist var. glabrata (A. Gray) Cronquist Native COCAGCanadian horseweed · Asteraceae 2 counties
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Coptis occidentalis (Nutt.) Torr. & A. Gray Native COOCIdaho goldthread · Ranunculaceae 1 county -
Corallorhiza maculata (Raf.) Raf. Native COMA25summer coralroot · Orchidaceae 8 counties - Corallorhiza maculata (Raf.) Raf. var. occidentalis (Lindl.) Ames Native COMAO5summer coralroot · Orchidaceae 1 county
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Corallorhiza mertensiana Bong. Native COME17Pacific coralroot · Orchidaceae 3 counties -
Corallorhiza striata Lindl. Native COST19hooded coralroot · Orchidaceae 7 counties - Corallorhiza striata Lindl. var. striata Native COSTS3hooded coralroot · Orchidaceae 5 counties
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Corallorhiza trifida Chatelain Native COTR18yellow coralroot · Orchidaceae 5 counties -
Corallorhiza wisteriana Conrad Native COWI5spring coralroot · Orchidaceae 3 counties -
Cordylanthus ramosus Nutt. ex Benth. Native CORA5bushy bird's beak · Scrophulariaceae 2 counties -
Coreopsis tinctoria Nutt. Native COTI3golden tickseed · Asteraceae 9 counties - Coreopsis tinctoria Nutt. var. atkinsoniana (Douglas ex Lindl.) H.M. Parker ex E.B. Sm. Native COTIAAtkinson's tickseed · Asteraceae 4 counties
- Coreopsis tinctoria Nutt. var. tinctoria Native COTITgolden tickseed · Asteraceae 1 county
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Corispermum americanum (Nutt.) Nutt. Native COAM8American bugseed · Chenopodiaceae 4 counties - Corispermum americanum (Nutt.) Nutt. var. americanum Native COAMA2American bugseed · Chenopodiaceae 4 counties
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Cornus canadensis L. Native COCA13bunchberry dogwood · Cornaceae 18 counties -
Cornus sericea L. Native COSE16redosier dogwood · Cornaceae 49 counties - Cornus sericea L. ssp. sericea Native COSESredosier dogwood · Cornaceae 49 counties
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Corydalis aurea Willd. Native COAU2scrambled eggs · Fumariaceae 18 counties -
Corydalis sempervirens (L.) Pers. Native COSE5rock harlequin · Fumariaceae 1 county -
Cotoneaster lucidus Schltdl. Introduced COLU5shiny cotoneaster · Rosaceae 1 county -
Crataegus chrysocarpa Ashe Native CRCHfireberry hawthorn · Rosaceae 11 counties - Crataegus chrysocarpa Ashe var. chrysocarpa Native CRCHC2red haw · Rosaceae 1 county
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Crataegus douglasii Lindl. Native CRDO2black hawthorn · Rosaceae 15 counties -
Crataegus monogyna Jacq. Introduced CRMO3oneseed hawthorn · Rosaceae 1 county -
Crataegus rivularis Nutt. Native CRRIriver hawthorn · Rosaceae 1 county -
Crataegus succulenta Schrad. ex Link Native CRSU5fleshy hawthorn · Rosaceae 4 counties -
Crataegus suksdorfii (Sarg.) Kruschke Native CRSU16Suksdorf's hawthorn · Rosaceae 1 county -
Crepis acuminata Nutt. Native CRAC2tapertip hawksbeard · Asteraceae 20 counties - Crepis acuminata Nutt. ssp. acuminata Native CRACAtapertip hawksbeard · Asteraceae 20 counties
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Crepis atribarba A. Heller Native CRATslender hawksbeard · Asteraceae 17 counties - Crepis atribarba A. Heller ssp. originalis (Babc. & Stebbins) Babc. & Stebbins Native CRATOslender hawksbeard · Asteraceae 2 counties
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Crepis capillaris (L.) Wallr. Introduced CRCA3smooth hawksbeard · Asteraceae 1 county -
Crepis elegans Hook. Native CRELelegant hawksbeard · Asteraceae 5 counties -
Crepis intermedia A. Gray Native CRIN4limestone hawksbeard · Asteraceae 3 counties -
Crepis modocensis Greene Native CRMO4Modoc hawksbeard · Asteraceae 11 counties - Crepis modocensis Greene ssp. modocensis Native CRMOMModoc hawksbeard · Asteraceae 11 counties
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Crepis nana Richardson Native CRNAdwarf alpine hawksbeard · Asteraceae 2 counties - Crepis nana Richardson ssp. nana Native CRNANdwarf alpine hawksbeard · Asteraceae 2 counties
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Crepis occidentalis Nutt. Native CROClargeflower hawksbeard · Asteraceae 27 counties - Crepis occidentalis Nutt. ssp. costata (A. Gray) Babc. & Stebbins Native CROCC2largeflower hawksbeard · Asteraceae 2 counties
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Crepis runcinata (James) Torr. & A. Gray Native CRRU3fiddleleaf hawksbeard · Asteraceae 17 counties - Crepis runcinata (James) Torr. & A. Gray ssp. glauca (Nutt.) Babc. & Stebbins Native CRRUGfiddleleaf hawksbeard · Asteraceae 2 counties
- Crepis runcinata (James) Torr. & A. Gray ssp. runcinata Native CRRURfiddleleaf hawksbeard · Asteraceae 4 counties
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Crepis tectorum L. Introduced CRTE3narrowleaf hawksbeard · Asteraceae 5 counties -
Cruciata pedemontana (Bellardi) Ehrend. Introduced CRPE10piedmont bedstraw · Rubiaceae 2 counties -
Crypsis alopecuroides (Piller & Mitterp.) Schrad. Introduced CRAL2foxtail pricklegrass · Poaceae 2 counties -
Cryptantha affinis (A. Gray) Greene Native CRAFquill cryptantha · Boraginaceae 6 counties -
Cryptantha ambigua (A. Gray) Greene Native CRAM3basin cryptantha · Boraginaceae 3 counties -
Cryptantha caespitosa (A. Nelson) Payson Native CRCA7tufted cryptantha · Boraginaceae 1 county -
Cryptantha celosioides (Eastw.) Payson Native CRCEbuttecandle · Boraginaceae 48 counties -
Cryptantha cinerea (Greene) Cronquist Native CRCI3James' cryptantha · Boraginaceae 1 county - Cryptantha cinerea (Greene) Cronquist var. jamesii (Torr.) Cronquist Native CRCIJJames' cryptantha · Boraginaceae 1 county
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Cryptantha fendleri (A. Gray) Greene Native CRFE3sanddune cryptantha · Boraginaceae 1 county -
Cryptantha kelseyana Greene Native CRKEKelsey's cryptantha · Boraginaceae 3 counties -
Cryptantha minima Rydb. Native CRMI5little cryptantha · Boraginaceae 4 counties -
Cryptantha spiculifera (Piper) Payson Native CRSP4Snake River cryptantha · Boraginaceae 3 counties -
Cryptantha torreyana (A. Gray) Greene Native CRTO4Torrey's cryptantha · Boraginaceae 9 counties -
Cryptantha watsonii (A. Gray) Greene Native CRWA2Watson's cryptantha · Boraginaceae 4 counties -
Cryptogramma acrostichoides R. Br. Native CRAC3American rockbrake · Pteridaceae 2 counties - Cryptogramma stelleri (S.G. Gmel.) Prantl Native CRST2fragile rockbrake · Pteridaceae 1 county
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Cuscuta approximata Bab. Introduced CUAP2alfalfa dodder · Cuscutaceae 12 counties -
Cuscuta coryli Engelm. Native CUCO3hazel dodder · Cuscutaceae 4 counties -
Cuscuta epithymum (L.) L. Introduced CUEPclover dodder · Cuscutaceae 7 counties -
Cuscuta gronovii Willd. ex Schult. Native CUGRscaldweed · Cuscutaceae 2 counties - Cuscuta gronovii Willd. ex Schult. var. gronovii Native CUGRGscaldweed · Cuscutaceae 2 counties
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Cuscuta indecora Choisy Native CUINbigseed alfalfa dodder · Cuscutaceae 2 counties - Cuscuta indecora Choisy var. neuropetala (Engelm.) Hitchc. Native CUINNbigseed dodder · Cuscutaceae 2 counties
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Cuscuta pentagona Engelm. Native CUPE3fiveangled dodder · Cuscutaceae 1 county - Cuscuta pentagona Engelm. var. pentagona Native CUPEP2fiveangled dodder · Cuscutaceae 1 county
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Cyclachaena xanthiifolia (Nutt.) Fresen. Native CYXA2carelessweed · Asteraceae 15 counties -
Cymopterus acaulis (Pursh) Raf. Native CYACplains springparsley · Apiaceae 24 counties - Cymopterus acaulis (Pursh) Raf. var. acaulis Native CYACAplains springparsley · Apiaceae 24 counties
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Cymopterus evertii R.L. Hartm. & Kirkpatrick Native CYEVEvert's springparsley · Apiaceae 1 county -
Cymopterus glaucus Nutt. Native CYGLwaxy springparsley · Apiaceae 2 counties -
Cymopterus longipes S. Watson Native CYLOlongstalk springparsley · Apiaceae 1 county -
Cymopterus nivalis S. Watson Native CYNI3snowline springparsley · Apiaceae 15 counties -
Cynodon dactylon (L.) Pers. Introduced CYDABermudagrass · Poaceae 2 counties -
Cynoglossum officinale L. Introduced CYOFgypsyflower · Boraginaceae 39 counties -
Cynosurus cristatus L. Introduced CYCRcrested dogstail grass · Poaceae 1 county -
Cyperus erythrorhizos Muhl. Native CYER2redroot flatsedge · Cyperaceae 1 county -
Cyperus schweinitzii Torr. Native CYSC3Schweinitz's flatsedge · Cyperaceae 1 county -
Cyperus squarrosus L. Native CYSQbearded flatsedge · Cyperaceae 3 counties -
Cypripedium montanum Douglas ex Lindl. Native CYMO2mountain lady's slipper · Orchidaceae 1 county -
Cystopteris fragilis (L.) Bernh. Native CYFR2brittle bladderfern · Dryopteridaceae 13 counties -
Cytisus scoparius (L.) Link Introduced CYSC4Scotch broom · Fabaceae 1 county - Cytisus scoparius (L.) Link var. scoparius Introduced CYSCS2Scotch broom · Fabaceae 1 county
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Dactylis glomerata L. Introduced DAGLorchardgrass · Poaceae 31 counties - Dactylis glomerata L. ssp. glomerata Introduced DAGLGorchardgrass · Poaceae 31 counties
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Dactylorhiza viridis (L.) R.M. Bateman, A.M. Pridgeon & M.W. Chase Native DAVI6longbract frog orchid · Orchidaceae 1 county -
Dalea candida Michx. ex Willd. Native DACA7white prairie clover · Fabaceae 38 counties - Dalea candida Michx. ex Willd. var. candida Native DACACwhite prairie clover · Fabaceae 1 county
- Dalea candida Michx. ex Willd. var. oligophylla (Torr.) Shinners Native DACAOwhite prairie clover · Fabaceae 38 counties
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Dalea enneandra Nutt. Native DAENnineanther prairie clover · Fabaceae 1 county -
Dalea purpurea Vent. Native DAPU5purple prairie clover · Fabaceae 37 counties - Dalea purpurea Vent. var. purpurea Native DAPUPpurple prairie clover · Fabaceae 37 counties
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Dalea villosa (Nutt.) Spreng. Native DAVIsilky prairie clover · Fabaceae 1 county - Dalea villosa (Nutt.) Spreng. var. villosa Native DAVIVsilky prairie clover · Fabaceae 1 county
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Danthonia californica Bol. Native DACA3California oatgrass · Poaceae 2 counties -
Danthonia intermedia Vasey Native DAINtimber oatgrass · Poaceae 2 counties -
Danthonia spicata (L.) P. Beauv. ex Roem. & Schult. Native DASP2poverty oatgrass · Poaceae 3 counties -
Danthonia unispicata (Thurb.) Munro ex Macoun Native DAUNonespike danthonia · Poaceae 4 counties -
Dasiphora fruticosa (L.) Rydb. Native DAFR6shrubby cinquefoil · Rosaceae 39 counties - Dasiphora fruticosa (L.) Rydb. ssp. floribunda (Pursh) Kartesz Native DAFRFshrubby cinquefoil · Rosaceae 39 counties
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Datura stramonium L. Introduced DASTjimsonweed · Solanaceae 5 counties -
Daucus carota L. Introduced DACA6Queen Anne's lace · Apiaceae 8 counties -
Delphinium andersonii A. Gray Native DEANAnderson's larkspur · Ranunculaceae 6 counties -
Delphinium bicolor Nutt. Native DEBIlittle larkspur · Ranunculaceae 49 counties - Delphinium bicolor Nutt. ssp. bicolor Native DEBIBlittle larkspur · Ranunculaceae 4 counties
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Delphinium geyeri Greene Native DEGE2Geyer's larkspur · Ranunculaceae 1 county -
Delphinium glaucescens Rydb. Native DEGL2smooth larkspur · Ranunculaceae 1 county -
Delphinium glaucum S. Watson Native DEGL3Sierra larkspur · Ranunculaceae 2 counties -
Delphinium nuttallianum Pritz. ex Walp. Native DENU2twolobe larkspur · Ranunculaceae 12 counties - Delphinium ×burkei Greene (pro sp.) [depauperatum × nuttallianum] Native DEBUlarkspur · Ranunculaceae 4 counties
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Delphinium ×occidentale (S. Watson) S. Watson (pro sp.) [barbeyi × glaucum] Native DEOCRanunculaceae 10 counties -
Deschampsia cespitosa (L.) P. Beauv. Native DECEtufted hairgrass · Poaceae 5 counties -
Deschampsia danthonioides (Trin.) Munro Native DEDAannual hairgrass · Poaceae 1 county -
Deschampsia elongata (Hook.) Munro Native DEELslender hairgrass · Poaceae 1 county -
Descurainia californica (A. Gray) O.E. Schulz Native DECA6Sierra tansymustard · Brassicaceae 1 county -
Descurainia incana (Bernh. ex Fisch. & C.A. Mey.) Dorn Native DEIN5mountain tansymustard · Brassicaceae 9 counties - Descurainia incana (Bernh. ex Fisch. & C.A. Mey.) Dorn ssp. incana Native DEINImountain tansymustard · Brassicaceae 8 counties
- Descurainia incana (Bernh. ex Fisch. & C.A. Mey.) Dorn ssp. procera (Greene) Kartesz & Gandhi Native DEINPmountain tansymustard · Brassicaceae 2 counties
- Descurainia incana (Bernh. ex Fisch. & C.A. Mey.) Dorn ssp. viscosa (Rydb.) Kartesz & Gandhi Native DEINVmountain tansymustard · Brassicaceae 1 county
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Descurainia pinnata (Walter) Britton Native DEPIwestern tansymustard · Brassicaceae 30 counties - Descurainia pinnata (Walter) Britton ssp. brachycarpa (Richardson) Detling Native DEPIBwestern tansymustard · Brassicaceae 2 counties
- Descurainia pinnata (Walter) Britton ssp. halictorum (Cockerell) Detling Native DEPIHwestern tansymustard · Brassicaceae 1 county
- Descurainia pinnata (Walter) Britton ssp. intermedia (Rydb.) Detling Native DEPIIwestern tansymustard · Brassicaceae 3 counties
- Descurainia pinnata (Walter) Britton ssp. nelsonii (Rydb.) Detling Native DEPINNelson's tansymustard · Brassicaceae 2 counties
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Descurainia sophia (L.) Webb ex Prantl Introduced DESO2herb sophia · Brassicaceae 44 counties -
Dianthus armeria L. Introduced DIARDeptford pink · Caryophyllaceae 13 counties -
Dianthus barbatus L. Introduced DIBAsweetwilliam · Caryophyllaceae 2 counties -
Dianthus deltoides L. Introduced DIDEmaiden pink · Caryophyllaceae 4 counties -
Dicentra uniflora Kellogg Native DIUNlonghorn steer's-head · Fumariaceae 3 counties -
Dichanthelium oligosanthes (Schult.) Gould Native DIOLHeller's rosette grass · Poaceae 1 county - Dichanthelium oligosanthes (Schult.) Gould var. scribnerianum (Nash) Gould Native DIOLSScribner's rosette grass · Poaceae 1 county
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Digitaria ischaemum (Schreb.) Schreb. ex Muhl. Introduced DIISsmooth crabgrass · Poaceae 7 counties -
Digitaria sanguinalis (L.) Scop. Introduced DISAhairy crabgrass · Poaceae 7 counties -
Diplotaxis muralis (L.) DC. Introduced DIMU2annual wallrocket · Brassicaceae 5 counties -
Dipsacus fullonum L. Introduced DIFU2Fuller's teasel · Dipsacaceae 6 counties -
Distichlis spicata (L.) Greene Native DISPsaltgrass · Poaceae 19 counties -
Dodecatheon conjugens Greene Native DOCOBonneville shootingstar · Primulaceae 25 counties - Dodecatheon conjugens Greene ssp. conjugens Native DOCOC3Bonneville shootingstar · Primulaceae 3 counties
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Dodecatheon jeffreyi Van Houtte Native DOJESierra shootingstar · Primulaceae 5 counties - Dodecatheon jeffreyi Van Houtte ssp. jeffreyi Native DOJEJSierra shootingstar · Primulaceae 5 counties
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Dodecatheon pulchellum (Raf.) Merr. Native DOPUdarkthroat shootingstar · Primulaceae 24 counties - Dodecatheon pulchellum (Raf.) Merr. ssp. pulchellum Native DOPUP2darkthroat shootingstar · Primulaceae 24 counties
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Douglasia conservatorum Björk Native DOCO7Bloom Peak dwarf-primrose · Primulaceae 1 county -
Douglasia montana A. Gray Native DOMORocky Mountain dwarf-primrose · Primulaceae 13 counties -
Downingia laeta (Greene) Greene Native DOLA2Great Basin calicoflower · Campanulaceae 1 county -
Draba albertina Greene Native DRAL4slender draba · Brassicaceae 7 counties -
Draba aurea Vahl ex Hornem. Native DRAUgolden draba · Brassicaceae 2 counties -
Draba borealis DC. Native DRBOboreal draba · Brassicaceae 1 county -
Draba brachycarpa Nutt. ex Torr. & A. Gray Native DRBRshortpod draba · Brassicaceae 5 counties -
Draba breweri S. Watson Native DRBR2cushion draba · Brassicaceae 7 counties - Draba breweri S. Watson var. cana (Rydb.) Rollins Native DRBRCcushion draba · Brassicaceae 7 counties
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Draba calcifuga Lesica Native DRCALesica's draba · Brassicaceae 9 counties -
Draba crassa Rydb. Native DRCRthickleaf draba · Brassicaceae 2 counties - Draba crassifolia Graham Native DRCR2snowbed draba · Brassicaceae 2 counties
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Draba densifolia Nutt. Native DRDEdenseleaf draba · Brassicaceae 3 counties -
Draba fladnizensis Wulfen Native DRFLAustrian draba · Brassicaceae 2 counties - Draba fladnizensis Wulfen var. fladnizensis Native DRFLF2Austrian draba · Brassicaceae 1 county
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Draba glabella Pursh Native DRGLsmooth draba · Brassicaceae 1 county - Draba glabella Pursh var. glabella Native DRGLG2smooth draba · Brassicaceae 1 county
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Draba globosa Payson Native DRGL6beavertip draba · Brassicaceae 2 counties -
Draba incerta Payson Native DRIN2Yellowstone draba · Brassicaceae 8 counties - Draba incerta Payson var. incerta Native DRINI4Yellowstone draba · Brassicaceae 8 counties
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Draba lonchocarpa Rydb. Native DRLOlancepod draba · Brassicaceae 2 counties - Draba lonchocarpa Rydb. var. lonchocarpa Native DRLOLlancepod draba · Brassicaceae 2 counties
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Draba nemorosa L. Native DRNEwoodland draba · Brassicaceae 22 counties - Draba oligosperma Hook. Native DROLfewseed draba · Brassicaceae 17 counties
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Draba paysonii J.F. Macbr. Native DRPAPayson's draba · Brassicaceae 8 counties -
Draba porsildii G. Mulligan Native DRPO2Porsild's draba · Brassicaceae 1 county -
Draba praealta Greene Native DRPRtall draba · Brassicaceae 2 counties -
Draba reptans (Lam.) Fernald Native DRRE2Carolina draba · Brassicaceae 12 counties -
Draba ventosa A. Gray Native DRVEWind River draba · Brassicaceae 2 counties -
Draba verna L. Introduced DRVE2spring draba · Brassicaceae 9 counties -
Dracocephalum parviflorum Nutt. Native DRPA2American dragonhead · Lamiaceae 10 counties -
Dracocephalum thymiflorum L. Introduced DRTHthymeleaf dragonhead · Lamiaceae 2 counties -
Drosera anglica Huds. Native DRANEnglish sundew · Droseraceae 2 counties -
Drosera rotundifolia L. Native DRROroundleaf sundew · Droseraceae 2 counties - Drosera rotundifolia L. var. rotundifolia Native DRRORroundleaf sundew · Droseraceae 2 counties
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Dryas drummondii Richardson ex Hook. Native DRDRDrummond's mountain-avens · Rosaceae 5 counties - Dryas drummondii Richardson ex Hook. var. drummondii Native DRDRDDrummond's mountain-avens · Rosaceae 5 counties
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Dryas octopetala L. Native DROCeightpetal mountain-avens · Rosaceae 10 counties - Dryas octopetala L. ssp. hookeriana (Juz.) Hultén Native DROCHHooker's mountain-avens · Rosaceae 2 counties
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Dryopteris expansa (C. Presl) Fraser-Jenkins & Jermy Native DREX2spreading woodfern · Dryopteridaceae 2 counties -
Dryopteris filix-mas (L.) Schott Native DRFI2male fern · Dryopteridaceae 1 county -
Dulichium arundinaceum (L.) Britton Native DUAR3three-way sedge · Cyperaceae 1 county - Dulichium arundinaceum (L.) Britton var. arundinaceum Native DUARAthree-way sedge · Cyperaceae 1 county
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Dysphania botrys (L.) Mosyakin & Clemants Introduced DYBOJerusalem oak goosefoot · Chenopodiaceae 11 counties -
Dyssodia papposa (Vent.) Hitchc. Native DYPAfetid marigold · Asteraceae 8 counties -
Echinacea angustifolia DC. Native ECAN2narrowleaf purple coneflower · Asteraceae 20 counties - Echinacea angustifolia DC. var. angustifolia Native ECANAnarrowleaf purple coneflower · Asteraceae 18 counties
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Echinochloa crus-galli (L.) P. Beauv. Introduced ECCRbarnyardgrass · Poaceae 38 counties -
Echinochloa muricata (P. Beauv.) Fernald Native ECMU2rough barnyardgrass · Poaceae 6 counties - Echinochloa muricata (P. Beauv.) Fernald var. microstachya Wiegand Native ECMUMrough barnyardgrass · Poaceae 6 counties
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Echinocystis lobata (Michx.) Torr. & A. Gray Native ECLOwild cucumber · Cucurbitaceae 7 counties -
Echium vulgare L. Introduced ECVUcommon viper's bugloss · Boraginaceae 8 counties -
Elaeagnus angustifolia L. Introduced ELANRussian olive · Elaeagnaceae 21 counties -
Elaeagnus commutata Bernh. ex Rydb. Native ELCOsilverberry · Elaeagnaceae 17 counties -
Elatine brachysperma A. Gray Native ELBR5shortseed waterwort · Elatinaceae 3 counties -
Elatine rubella Rydb. Native ELRUsouthwestern waterwort · Elatinaceae 2 counties -
Eleocharis acicularis (L.) Roem. & Schult. Native ELACneedle spikerush · Cyperaceae 13 counties - Eleocharis acicularis (L.) Roem. & Schult. var. acicularis Native ELACAneedle spikerush · Cyperaceae 11 counties
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Eleocharis atropurpurea (Retz.) J. Presl & C. Presl Native ELATpurple spikerush · Cyperaceae 1 county -
Eleocharis elliptica Kunth Native ELEL4elliptic spikerush · Cyperaceae 3 counties -
Eleocharis erythropoda Steud. Native ELERbald spikerush · Cyperaceae 1 county -
Eleocharis flavescens (Poir.) Urb. Native ELFLyellow spikerush · Cyperaceae 1 county - Eleocharis flavescens (Poir.) Urb. var. thermalis (Rydb.) Cronquist Native ELFLTyellow spikerush · Cyperaceae 1 county
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Eleocharis macrostachya Britton Native ELMA5pale spikerush · Cyperaceae 9 counties -
Eleocharis palustris (L.) Roem. & Schult. Native ELPA3common spikerush · Cyperaceae 20 counties - Eleocharis palustris (L.) Roem. & Schult. var. palustris Native ELPAPcommon spikerush · Cyperaceae 20 counties
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Eleocharis quinqueflora (Hartmann) O. Schwarz Native ELQU2fewflower spikerush · Cyperaceae 2 counties -
Eleocharis rostellata (Torr.) Torr. Native ELRO2beaked spikerush · Cyperaceae 3 counties -
Ellisia nyctelea (L.) L. Native ELNYAunt Lucy · Hydrophyllaceae 33 counties -
Elodea bifoliata H. St. John Native ELBI2twoleaf waterweed · Hydrocharitaceae 2 counties -
Elodea canadensis Michx. Native ELCA7Canadian waterweed · Hydrocharitaceae 5 counties -
Elodea nuttallii (Planch.) H. St. John Native ELNU2western waterweed · Hydrocharitaceae 6 counties -
Elymus alaskanus (Scribn. & Merr.) Á. Löve Native ELAL5Alaskan wheatgrass · Poaceae 3 counties - Elymus alaskanus (Scribn. & Merr.) Á. Löve ssp. latiglumis (Scribn. & J.G. Sm.) Á. Löve Native ELALLAlaskan wheatgrass · Poaceae 3 counties
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Elymus albicans (Scribn. & J.G. Sm.) Á. Löve Native ELAL7Montana wheatgrass · Poaceae 3 counties -
Elymus canadensis L. Native ELCA4Canada wildrye · Poaceae 18 counties -
Elymus elymoides (Raf.) Swezey Native ELEL5squirreltail · Poaceae 14 counties - Elymus elymoides (Raf.) Swezey ssp. brevifolius (J.G. Sm.) Barkworth Native ELELB2squirreltail · Poaceae 10 counties
- Elymus elymoides (Raf.) Swezey ssp. elymoides Native ELELEsquirreltail · Poaceae 4 counties
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Elymus glaucus Buckley Native ELGLblue wildrye · Poaceae 5 counties - Elymus glaucus Buckley ssp. glaucus Native ELGLGblue wildrye · Poaceae 1 county
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Elymus lanceolatus (Scribn. & J.G. Sm.) Gould Native ELLA3thickspike wheatgrass · Poaceae 5 counties - Elymus lanceolatus (Scribn. & J.G. Sm.) Gould ssp. lanceolatus Native ELLALthickspike wheatgrass · Poaceae 5 counties
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Elymus repens (L.) Gould Introduced ELRE4quackgrass · Poaceae 41 counties -
Elymus scribneri (Vasey) M.E. Jones Native ELSC4spreading wheatgrass · Poaceae 2 counties -
Elymus trachycaulus (Link) Gould ex Shinners Native ELTR7slender wheatgrass · Poaceae 22 counties - Elymus trachycaulus (Link) Gould ex Shinners ssp. subsecundus (Link) Á. Löve & D. Löve Native ELTRSslender wheatgrass · Poaceae 2 counties
- Elymus trachycaulus (Link) Gould ex Shinners ssp. trachycaulus Native ELTRTslender wheatgrass · Poaceae 2 counties
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Elymus villosus Muhl. ex Willd. Native ELVIhairy wildrye · Poaceae 1 county -
Elymus virginicus L. Native ELVI3Virginia wildrye · Poaceae 1 county - Elymus virginicus L. var. virginicus Native ELVIVVirginia wildrye · Poaceae 1 county
- Elymus ×hansenii Scribn. (pro sp.) [glaucus × elymoides or multisetus] Native ELHA3Poaceae 1 county
- Elymus ×saundersii Vasey (pro sp.) [elymoides × trachycaulus] Native ELSA4Poaceae 3 counties
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Endolepis dioica (Nutt.) Standl. Native ENDISuckley's endolepis · Chenopodiaceae 12 counties -
Epilobium anagallidifolium Lam. Native EPAN4pimpernel willowherb · Onagraceae 17 counties -
Epilobium brachycarpum C. Presl Native EPBR3tall annual willowherb · Onagraceae 20 counties -
Epilobium canum (Greene) P.H. Raven Native EPCA3hummingbird trumpet · Onagraceae 2 counties - Epilobium canum (Greene) P.H. Raven ssp. garrettii (A. Nelson) P.H. Raven Native EPCAGGarrett's firechalice · Onagraceae 2 counties
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Epilobium ciliatum Raf. Native EPCIfringed willowherb · Onagraceae 30 counties - Epilobium ciliatum Raf. ssp. ciliatum Native EPCICfringed willowherb · Onagraceae 8 counties
- Epilobium ciliatum Raf. ssp. glandulosum (Lehm.) Hoch & P.H. Raven Native EPCIGfringed willowherb · Onagraceae 27 counties
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Epilobium clavatum Trel. Native EPCLtalus willowherb · Onagraceae 2 counties -
Epilobium glaberrimum Barbey Native EPGLglaucus willowherb · Onagraceae 2 counties - Epilobium glaberrimum Barbey ssp. fastigiatum (Nutt.) Hoch & P.H. Raven Native EPGLFglaucus willowherb · Onagraceae 2 counties
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Epilobium halleanum Hausskn. Native EPHAglandular willowherb · Onagraceae 2 counties -
Epilobium hornemannii Rchb. Native EPHOHornemann's willowherb · Onagraceae 2 counties - Epilobium hornemannii Rchb. ssp. hornemannii Native EPHOHHornemann's willowherb · Onagraceae 2 counties
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Epilobium lactiflorum Hausskn. Native EPLA3milkflower willowherb · Onagraceae 2 counties -
Epilobium leptophyllum Raf. Native EPLE2bog willowherb · Onagraceae 4 counties -
Epilobium palustre L. Native EPPAmarsh willowherb · Onagraceae 2 counties -
Epilobium pygmaeum (Speg.) Hoch & P.H. Raven Native EPPY4smooth spike-primrose · Onagraceae 5 counties -
Epilobium saximontanum Hausskn. Native EPSARocky Mountain willowherb · Onagraceae 2 counties -
Epilobium suffruticosum Nutt. Native EPSUshrubby willowherb · Onagraceae 2 counties -
Epipactis gigantea Douglas ex Hook. Native EPGIstream orchid · Orchidaceae 8 counties -
Epipactis helleborine (L.) Crantz Introduced EPHEbroadleaf helleborine · Orchidaceae 1 county -
Equisetum arvense L. Native EQARfield horsetail · Equisetaceae 11 counties -
Equisetum fluviatile L. Native EQFLwater horsetail · Equisetaceae 1 county -
Equisetum hyemale L. Native EQHYscouringrush horsetail · Equisetaceae 5 counties - Equisetum hyemale L. var. affine (Engelm.) A.A. Eaton Native EQHYAscouringrush horsetail · Equisetaceae 5 counties
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Equisetum laevigatum A. Braun Native EQLAsmooth horsetail · Equisetaceae 10 counties -
Equisetum variegatum Schleich. ex F. Weber & D. Mohr Native EQVAvariegated scouringrush · Equisetaceae 2 counties - Equisetum variegatum Schleich. ex F. Weber & D. Mohr var. variegatum Native EQVAVvariegated scouringrush · Equisetaceae 2 counties
- Equisetum ×ferrissii Clute (pro sp.) [hyemale × laevigatum] Native EQFEEquisetaceae 2 counties
- Equisetum ×mackaii (Newm.) Brichan [hyemale × variegatum] Native EQMAhorsetail · Equisetaceae 1 county
- Equisetum ×nelsonii (A.A. Eaton) Schaffn. (pro sp.) [laevigatum × variegatum] Native EQNEhorsetail · Equisetaceae 2 counties
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Eragrostis cilianensis (All.) Vign. ex Janchen Introduced ERCIstinkgrass · Poaceae 29 counties -
Eragrostis hypnoides (Lam.) Britton, Sterns & Poggenb. Native ERHYteal lovegrass · Poaceae 1 county - Eragrostis minor Host Introduced ERMI5little lovegrass · Poaceae 2 counties
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Eragrostis pectinacea (Michx.) Nees ex Steud. Native ERPEtufted lovegrass · Poaceae 1 county - Eragrostis pectinacea (Michx.) Nees ex Steud. var. pectinacea Native ERPEP2tufted lovegrass · Poaceae 1 county
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Eremopyrum triticeum (Gaertn.) Nevski Introduced ERTR13annual wheatgrass · Poaceae 7 counties -
Ericameria discoidea (Nutt.) G.L. Nesom Native ERDI14whitestem goldenbush · Asteraceae 1 county - Ericameria discoidea (Nutt.) G.L. Nesom var. discoidea Native ERDIDwhitestem goldenbush · Asteraceae 1 county
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Ericameria nauseosa (Pall. ex Pursh) G.L. Nesom & Baird Native ERNA10rubber rabbitbrush · Asteraceae 40 counties - Ericameria nauseosa (Pall. ex Pursh) G.L. Nesom & Baird ssp. consimilis (Greene) G.L. Nesom & Baird Native ERNAC2rubber rabbitbrush · Asteraceae 2 counties
- Ericameria nauseosa (Pall. ex Pursh) G.L. Nesom & Baird ssp. consimilis (Greene) G.L. Nesom & Baird var. oreophila (A. Nelson) G.L. Nesom & Baird Native ERNAOrubber rabbitbrush · Asteraceae 2 counties
- Ericameria nauseosa (Pall. ex Pursh) G.L. Nesom & Baird ssp. nauseosa Native ERNAN3rubber rabbitbrush · Asteraceae 40 counties
- Ericameria nauseosa (Pall. ex Pursh) G.L. Nesom & Baird ssp. nauseosa var. glabrata (A. Gray) G.L. Nesom & Baird Native ERNAGrubber rabbitbrush · Asteraceae 11 counties
- Ericameria nauseosa (Pall. ex Pursh) G.L. Nesom & Baird ssp. nauseosa var. nauseosa Native ERNAN5rubber rabbitbrush · Asteraceae 38 counties
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Ericameria suffruticosa (Nutt.) G.L. Nesom Native ERSU13singlehead goldenbush · Asteraceae 3 counties -
Erigeron acris L. Native ERAC2bitter fleabane · Asteraceae 13 counties - Erigeron acris L. ssp. debilis (A. Gray) Piper Native ERACD2bitter fleabane · Asteraceae 2 counties
- Erigeron acris L. ssp. politus (Fr.) Schinz & R. Keller Native ERACP2bitter fleabane · Asteraceae 1 county
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Erigeron bellidiastrum Nutt. Native ERBE2western daisy fleabane · Asteraceae 1 county - Erigeron bellidiastrum Nutt. var. bellidiastrum Native ERBEBwestern daisy fleabane · Asteraceae 1 county
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Erigeron caespitosus Nutt. Native ERCA2tufted fleabane · Asteraceae 27 counties -
Erigeron compositus Pursh Native ERCO4cutleaf daisy · Asteraceae 26 counties -
Erigeron concinnus (Hook. & Arn.) Torr. & A. Gray Native ERCO27Navajo fleabane · Asteraceae 1 county - Erigeron concinnus (Hook. & Arn.) Torr. & A. Gray var. concinnus Native ERCOC3Navajo fleabane · Asteraceae 1 county
- Erigeron concinnus (Hook. & Arn.) Torr. & A. Gray var. condensatus D.C. Eaton Native ERCOC4Navajo fleabane · Asteraceae 1 county
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Erigeron corymbosus Nutt. Native ERCO5longleaf fleabane · Asteraceae 15 counties -
Erigeron coulteri Porter Native ERCO6large mountain fleabane · Asteraceae 1 county -
Erigeron divergens Torr. & A. Gray Native ERDI4spreading fleabane · Asteraceae 20 counties -
Erigeron eatonii A. Gray Native EREAEaton's fleabane · Asteraceae 2 counties - Erigeron eatonii A. Gray var. eatonii Native EREAEEaton's fleabane · Asteraceae 2 counties
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Erigeron engelmannii A. Nelson Native ERENEngelmann's fleabane · Asteraceae 2 counties - Erigeron engelmannii A. Nelson var. engelmannii Native ERENEEngelmann's fleabane · Asteraceae 2 counties
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Erigeron filifolius (Hook.) Nutt. Native ERFI2threadleaf fleabane · Asteraceae 1 county - Erigeron filifolius (Hook.) Nutt. var. filifolius Native ERFIFthreadleaf fleabane · Asteraceae 1 county
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Erigeron flabellifolius Rydb. Native ERFL8fanleaf fleabane · Asteraceae 1 county -
Erigeron flagellaris A. Gray Native ERFLtrailing fleabane · Asteraceae 1 county -
Erigeron formosissimus Greene Native ERFO3beautiful fleabane · Asteraceae 1 county -
Erigeron glabellus Nutt. Native ERGL2streamside fleabane · Asteraceae 24 counties - Erigeron glabellus Nutt. var. glabellus Native ERGLGstreamside fleabane · Asteraceae 2 counties
- Erigeron glabellus Nutt. var. pubescens Hook. Native ERGLPstreamside fleabane · Asteraceae 2 counties
- Erigeron gracilis Rydb. Native ERGR2quill fleabane · Asteraceae 1 county
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Erigeron humilis Graham Native ERHUarctic alpine fleabane · Asteraceae 1 county -
Erigeron leiomerus A. Gray Native ERLE6rockslide yellow fleabane · Asteraceae 2 counties -
Erigeron linearis (Hook.) Piper Native ERLIdesert yellow fleabane · Asteraceae 1 county -
Erigeron lonchophyllus Hook. Native ERLOshortray fleabane · Asteraceae 7 counties -
Erigeron ochroleucus Nutt. Native EROCbuff fleabane · Asteraceae 1 county -
Erigeron peregrinus (Banks ex Pursh) Greene Native ERPE3subalpine fleabane · Asteraceae 15 counties - Erigeron peregrinus (Banks ex Pursh) Greene ssp. callianthemus (Greene) Cronquist Native ERPECsubalpine fleabane · Asteraceae 15 counties
- Erigeron peregrinus (Banks ex Pursh) Greene ssp. callianthemus (Greene) Cronquist var. callianthemus Native ERPEC2subalpine fleabane · Asteraceae 15 counties
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Erigeron philadelphicus L. Native ERPHPhiladelphia fleabane · Asteraceae 5 counties - Erigeron philadelphicus L. var. philadelphicus Native ERPHPPhiladelphia fleabane · Asteraceae 5 counties
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Erigeron pumilus Nutt. Native ERPU2shaggy fleabane · Asteraceae 42 counties - Erigeron pumilus Nutt. ssp. pumilus Native ERPUP3shaggy fleabane · Asteraceae 4 counties
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Erigeron rydbergii Cronquist Native ERRYRydberg's fleabane · Asteraceae 10 counties -
Erigeron simplex Greene Native ERSI3onestem fleabane · Asteraceae 9 counties -
Erigeron speciosus (Lindl.) DC. Native ERSP4aspen fleabane · Asteraceae 19 counties - Erigeron speciosus (Lindl.) DC. var. macranthus (Nutt.) Cronquist Native ERSPMaspen fleabane · Asteraceae 2 counties
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Erigeron strigosus Muhl. ex Willd. Native ERST3prairie fleabane · Asteraceae 13 counties - Erigeron strigosus Muhl. ex Willd. var. beyrichii (Fisch. & C.A. Mey.) Torr. & A. Gray ex A. Gray Native ERSTBBeyrich's fleabane · Asteraceae 1 county
- Erigeron strigosus Muhl. ex Willd. var. septentrionalis (Fernald & Wiegand) Fernald Native ERSTSprairie fleabane · Asteraceae 1 county
- Erigeron strigosus Muhl. ex Willd. var. strigosus Native ERSTS2prairie fleabane · Asteraceae 1 county
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Erigeron subtrinervis Rydb. ex Porter & Britton Native ERSU2threenerve fleabane · Asteraceae 7 counties - Erigeron subtrinervis Rydb. ex Porter & Britton var. conspicuus (Rydb.) Cronquist Native ERSUCthreenerve fleabane · Asteraceae 1 county
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Erigeron tener (A. Gray) A. Gray Native ERTE6slender fleabane · Asteraceae 1 county -
Erigeron tweedyi Canby Native ERTWTweedy's fleabane · Asteraceae 4 counties -
Erigeron ursinus D.C. Eaton Native ERUR2Bear River fleabane · Asteraceae 4 counties -
Eriogonum annuum Nutt. Native ERAN4annual buckwheat · Polygonaceae 11 counties -
Eriogonum brevicaule Nutt. Native ERBR5shortstem buckwheat · Polygonaceae 2 counties - Eriogonum brevicaule Nutt. var. brevicaule Native ERBRB4shortstem buckwheat · Polygonaceae 1 county
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Eriogonum cernuum Nutt. Native ERCE2nodding buckwheat · Polygonaceae 5 counties - Eriogonum cernuum Nutt. var. cernuum Native ERCECnodding buckwheat · Polygonaceae 4 counties
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Eriogonum flavum Nutt. Native ERFL4alpine golden buckwheat · Polygonaceae 50 counties - Eriogonum flavum Nutt. var. flavum Native ERFLFalpine golden buckwheat · Polygonaceae 4 counties
- Eriogonum flavum Nutt. var. polyphyllum (Small ex Rydb.) M.E. Jones Native ERFLP2alpine golden buckwheat · Polygonaceae 1 county
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Eriogonum heracleoides Nutt. Native ERHE2parsnipflower buckwheat · Polygonaceae 7 counties - Eriogonum heracleoides Nutt. var. heracleoides Native ERHEH3parsnipflower buckwheat · Polygonaceae 7 counties
- Eriogonum lagopus Rydb. Native ERLA9parasol buckwheat · Polygonaceae 10 counties
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Eriogonum mancum Rydb. Native ERMA3imperfect buckwheat · Polygonaceae 1 county -
Eriogonum microthecum Nutt. Native ERMI4slender buckwheat · Polygonaceae 8 counties -
Eriogonum ovalifolium Nutt. Native EROVcushion buckwheat · Polygonaceae 28 counties - Eriogonum ovalifolium Nutt. var. ochroleucum (Small ex Rydb.) M. Peck Native EROVO4cushion buckwheat · Polygonaceae 2 counties
- Eriogonum ovalifolium Nutt. var. ovalifolium Native EROVO5cushion buckwheat · Polygonaceae 2 counties
- Eriogonum ovalifolium Nutt. var. purpureum (Nutt.) Durand Native EROVP2cushion buckwheat · Polygonaceae 2 counties
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Eriogonum pauciflorum Pursh Native ERPA9fewflower buckwheat · Polygonaceae 26 counties - Eriogonum pauciflorum Pursh var. gnaphalodes (Benth.) Reveal Native ERPAGfewflower buckwheat · Polygonaceae 1 county
- Eriogonum pauciflorum Pursh var. pauciflorum Native ERPAP6fewflower buckwheat · Polygonaceae 25 counties
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Eriogonum pyrolifolium Hook. Native ERPY2Shasta buckwheat · Polygonaceae 1 county - Eriogonum pyrolifolium Hook. var. coryphaeum Torr. & A. Gray Native ERPYCShasta buckwheat · Polygonaceae 1 county
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Eriogonum strictum Benth. Native ERST4Blue Mountain buckwheat · Polygonaceae 21 counties - Eriogonum strictum Benth. ssp. proliferum (Torr. & A. Gray) S. Stokes Native ERSTPBlue Mountain buckwheat · Polygonaceae 21 counties
- Eriogonum strictum Benth. ssp. proliferum (Torr. & A. Gray) S. Stokes var. proliferum (Torr. & A. Gray) C.L. Hitchc. Native ERSTP3Blue Mountain buckwheat · Polygonaceae 21 counties
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Eriogonum umbellatum Torr. Native ERUMsulphur-flower buckwheat · Polygonaceae 32 counties - Eriogonum umbellatum Torr. var. dichrocephalum Gandog. Native ERUMD3sulphur-flower buckwheat · Polygonaceae 2 counties
- Eriogonum umbellatum Torr. var. majus Hook. Native ERUMMsulphur-flower buckwheat · Polygonaceae 3 counties
- Eriogonum umbellatum Torr. var. umbellatum Native ERUMU2sulphur-flower buckwheat · Polygonaceae 1 county
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Eriophorum angustifolium Honck. Native ERAN6tall cottongrass · Cyperaceae 11 counties - Eriophorum angustifolium Honck. ssp. angustifolium Native ERANA3tall cottongrass · Cyperaceae 11 counties
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Eriophorum callitrix Cham. ex C.A. Mey. Native ERCA13arctic cottongrass · Cyperaceae 1 county - Eriophorum callitrix Cham. ex C.A. Mey. var. callitrix Native ERCAC2arctic cottongrass · Cyperaceae 1 county
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Eriophorum chamissonis C.A. Mey. Native ERCH7Chamisso's cottongrass · Cyperaceae 3 counties -
Eriophorum gracile W.D.J. Koch Native ERGR8slender cottongrass · Cyperaceae 4 counties - Eriophorum gracile W.D.J. Koch var. gracile Native ERGRG2slender cottongrass · Cyperaceae 4 counties
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Eriophorum viridicarinatum (Engelm.) Fernald Native ERVI9thinleaf cottonsedge · Cyperaceae 2 counties -
Eriophyllum lanatum (Pursh) Forbes Native ERLA6common woolly sunflower · Asteraceae 10 counties - Eriophyllum lanatum (Pursh) Forbes var. integrifolium (Hook.) Smiley Native ERLAIcommon woolly sunflower · Asteraceae 2 counties
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Eritrichium howardii (A. Gray) Rydb. Native ERHO8Howard's alpine forget-me-not · Boraginaceae 8 counties -
Eritrichium nanum (Vill.) Schrad. ex Gaudin Native ERNAarctic alpine forget-me-not · Boraginaceae 10 counties - Eritrichium nanum (Vill.) Schrad. ex Gaudin var. elongatum (Rydb.) Cronquist Native ERNAEarctic alpine forget-me-not · Boraginaceae 10 counties
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Erodium cicutarium (L.) L'Hér. ex Aiton Introduced ERCI6redstem stork's bill · Geraniaceae 24 counties - Erodium cicutarium (L.) L'Hér. ex Aiton ssp. cicutarium Introduced ERCICredstem stork's bill · Geraniaceae 23 counties
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Eruca vesicaria (L.) Cav. Introduced ERVE5rocketsalad · Brassicaceae 3 counties - Eruca vesicaria (L.) Cav. ssp. sativa (Mill.) Thell. Introduced ERVESrocketsalad · Brassicaceae 3 counties
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Erucastrum gallicum (Willd.) O.E. Schulz Introduced ERGAcommon dogmustard · Brassicaceae 7 counties -
Erysimum asperum (Nutt.) DC. Native ERAS2western wallflower · Brassicaceae 2 counties - Erysimum capitatum (Douglas ex Hook.) Greene Native ERCA14sanddune wallflower · Brassicaceae 48 counties
- Erysimum capitatum (Douglas ex Hook.) Greene var. capitatum Native ERCACsanddune wallflower · Brassicaceae 48 counties
- Erysimum capitatum (Douglas ex Hook.) Greene var. purshii (Durand) Rollins Native ERCAP3Pursh's wallflower · Brassicaceae 3 counties
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Erysimum cheiranthoides L. Introduced ERCH9wormseed wallflower · Brassicaceae 20 counties -
Erysimum inconspicuum (S. Watson) MacMill. Native ERIN7shy wallflower · Brassicaceae 22 counties - Erysimum inconspicuum (S. Watson) MacMill. var. inconspicuum Native ERINI6shy wallflower · Brassicaceae 22 counties
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Erysimum repandum L. Introduced ERRE4spreading wallflower · Brassicaceae 10 counties -
Erythronium grandiflorum Pursh Native ERGR9yellow avalanche-lily · Liliaceae 13 counties - Erythronium grandiflorum Pursh ssp. grandiflorum Native ERGRG3yellow avalanche-lily · Liliaceae 2 counties
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Escobaria missouriensis (Sweet) D.R. Hunt Native ESMI3Missouri foxtail cactus · Cactaceae 6 counties -
Escobaria vivipara (Nutt.) Buxbaum Native ESVI2spinystar · Cactaceae 10 counties - Escobaria vivipara (Nutt.) Buxbaum var. vivipara Native ESVIVspinystar · Cactaceae 10 counties
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Eucephalus elegans Nutt. Native EUEL2elegant aster · Asteraceae 5 counties -
Eucephalus engelmannii (D.C. Eaton) Greene Native EUENEngelmann's aster · Asteraceae 6 counties -
Euclidium syriacum (L.) W.T. Aiton Introduced EUSYSyrian mustard · Brassicaceae 1 county -
Euonymus alatus (Thunb.) Siebold Introduced EUAL13burningbush · Celastraceae 1 county - Euonymus alatus (Thunb.) Siebold var. alatus Introduced EUALA2burningbush · Celastraceae 1 county
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Euphorbia agraria M. Bieb. Introduced EUAGurban spurge · Euphorbiaceae 1 county -
Euphorbia brachycera Engelm. Native EUBRhorned spurge · Euphorbiaceae 17 counties -
Euphorbia cyparissias L. Introduced EUCY2cypress spurge · Euphorbiaceae 26 counties -
Euphorbia esula L. Introduced EUESleafy spurge · Euphorbiaceae 56 counties - Euphorbia esula L. var. esula Introduced EUESEleafy spurge · Euphorbiaceae 4 counties
- Euphorbia esula L. var. uralensis (Fisch. ex Link) Dorn Introduced EUESURussian leafy spurge · Euphorbiaceae 4 counties
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Euphorbia helioscopia L. Introduced EUHE2madwoman's milk · Euphorbiaceae 6 counties -
Euphorbia marginata Pursh Native EUMA8snow on the mountain · Euphorbiaceae 4 counties -
Euphorbia peplus L. Introduced EUPE6petty spurge · Euphorbiaceae 2 counties -
Euphorbia spathulata Lam. Native EUSPwarty spurge · Euphorbiaceae 17 counties -
Euphrasia subarctica Raup Native EUSU2arctic eyebright · Scrophulariaceae 1 county -
Eurybia conspicua (Lindl.) G.L. Nesom Native EUCO36western showy aster · Asteraceae 18 counties -
Eurybia glauca (Nutt.) G.L. Nesom Native EUGL19gray aster · Asteraceae 2 counties - Eurybia glauca (Nutt.) G.L. Nesom var. glauca Native EUGLG2gray aster · Asteraceae 2 counties
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Eurybia integrifolia (Nutt.) G.L. Nesom Native EUIN9thickstem aster · Asteraceae 14 counties -
Eurybia merita (A. Nelson) G.L. Nesom Native EUME17subalpine aster · Asteraceae 1 county -
Eurybia sibirica (L.) G.L. Nesom Native EUSI13arctic aster · Asteraceae 2 counties -
Euthamia graminifolia (L.) Nutt. Native EUGR5flat-top goldentop · Asteraceae 1 county - Euthamia graminifolia (L.) Nutt. var. graminifolia Native EUGRGflat-top goldentop · Asteraceae 1 county
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Euthamia occidentalis Nutt. Native EUOC4western goldentop · Asteraceae 8 counties -
Eutrochium maculatum (L.) E.E. Lamont Native EUMA9spotted joe pye weed · Asteraceae 1 county - Eutrochium maculatum (L.) E.E. Lamont var. bruneri (A. Gray) E.E. Lamont Native EUMAB4spotted joe pye weed · Asteraceae 1 county
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Evolvulus nuttallianus Schult. Native EVNUshaggy dwarf morning-glory · Convolvulaceae 4 counties -
Fagopyrum esculentum Moench Introduced FAES2buckwheat · Polygonaceae 1 county -
Festuca baffinensis Polunin Native FEBABaffin fescue · Poaceae 2 counties -
Festuca brachyphylla Schult. ex Schult. & Schult. f. Native FEBRalpine fescue · Poaceae 2 counties -
Festuca campestris Rydb. Native FECA4rough fescue · Poaceae 1 county -
Festuca hallii (Vasey) Piper Native FEHA3plains rough fescue · Poaceae 2 counties -
Festuca idahoensis Elmer Native FEIDIdaho fescue · Poaceae 2 counties - Festuca idahoensis Elmer ssp. idahoensis Native FEIDI2Idaho fescue · Poaceae 2 counties
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Festuca rubra L. Both FERU2red fescue · Poaceae 19 counties - Festuca rubra L. ssp. arenaria (Osbeck) F. Aresch. Native FERUA3red fescue · Poaceae 1 county
- Festuca saximontana Rydb. Native FESARocky Mountain fescue · Poaceae 5 counties
- Festuca saximontana Rydb. var. saximontana Native FESASRocky Mountain fescue · Poaceae 5 counties
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Festuca subulata Trin. Native FESUbearded fescue · Poaceae 1 county -
Festuca valesiaca Schleich. ex Gaudin Introduced FEVA2Volga fescue · Poaceae 1 county -
Festuca viviparoidea Krajina ex Pavlick Native FEVI4northern fescue · Poaceae 2 counties - Festuca viviparoidea Krajina ex Pavlick ssp. krajinae Frederiksen Native FEVIK2northern fescue · Poaceae 2 counties
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Floerkea proserpinacoides Willd. Native FLPRfalse mermaidweed · Limnanthaceae 3 counties -
Fragaria vesca L. Native FRVEwoodland strawberry · Rosaceae 15 counties - Fragaria vesca L. ssp. americana (Porter) Staudt Native FRVEA2woodland strawberry · Rosaceae 1 county
- Fragaria vesca L. ssp. bracteata (A. Heller) Staudt Native FRVEB2woodland strawberry · Rosaceae 13 counties
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Fragaria virginiana Duchesne Native FRVIVirginia strawberry · Rosaceae 27 counties - Fragaria virginiana Duchesne ssp. glauca (S. Watson) Staudt Native FRVIG2Virginia strawberry · Rosaceae 4 counties
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Frangula purshiana (DC.) A. Gray Native FRPU7Cascara buckthorn · Rhamnaceae 4 counties - Frangula purshiana (DC.) A. Gray ssp. purshiana Native FRPUPCascara buckthorn · Rhamnaceae 4 counties
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Frasera albicaulis Douglas ex Griseb. Native FRAL2whitestem frasera · Gentianaceae 1 county - Frasera albicaulis Douglas ex Griseb. var. albicaulis Native FRALAwhitestem frasera · Gentianaceae 1 county
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Frasera speciosa Douglas ex Griseb. Native FRSPelkweed · Gentianaceae 18 counties -
Fraxinus pennsylvanica Marshall Native FRPEgreen ash · Oleaceae 28 counties -
Fritillaria atropurpurea Nutt. Native FRATspotted fritillary · Liliaceae 3 counties -
Fritillaria pudica (Pursh) Spreng. Native FRPU2yellow fritillary · Liliaceae 12 counties -
Fumaria officinalis L. Introduced FUOFdrug fumitory · Fumariaceae 14 counties - Fumaria officinalis L. ssp. officinalis Introduced FUOFOdrug fumitory · Fumariaceae 14 counties
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Fumaria vaillantii Loisel. Introduced FUVAearthsmoke · Fumariaceae 2 counties -
Gaillardia aristata Pursh Native GAARblanketflower · Asteraceae 56 counties -
Galeopsis tetrahit L. Introduced GATE2brittlestem hempnettle · Lamiaceae 10 counties - Galeopsis tetrahit L. var. tetrahit Introduced GATET2brittlestem hempnettle · Lamiaceae 10 counties
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Galinsoga quadriradiata Cav. Introduced GAQUshaggy soldier · Asteraceae 2 counties -
Galium aparine L. Native GAAP2stickywilly · Rubiaceae 21 counties -
Galium bifolium S. Watson Native GABItwinleaf bedstraw · Rubiaceae 11 counties -
Galium boreale L. Native GABO2northern bedstraw · Rubiaceae 51 counties -
Galium mollugo L. Introduced GAMOfalse baby's breath · Rubiaceae 2 counties -
Galium palustre L. Native GAPA3common marsh bedstraw · Rubiaceae 2 counties -
Galium trifidum L. Native GATR2threepetal bedstraw · Rubiaceae 16 counties - Galium trifidum L. ssp. trifidum Native GATRT5threepetal bedstraw · Rubiaceae 3 counties
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Galium triflorum Michx. Native GATR3fragrant bedstraw · Rubiaceae 7 counties -
Galium verum L. Introduced GAVEYellow Spring bedstraw · Rubiaceae 8 counties - Galium verum L. var. verum Introduced GAVEVYellow Spring bedstraw · Rubiaceae 8 counties
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Gaultheria humifusa (Graham) Rydb. Native GAHUalpine spicywintergreen · Ericaceae 5 counties -
Gaultheria ovatifolia A. Gray Native GAOV2western teaberry · Ericaceae 1 county -
Gayophytum diffusum Torr. & A. Gray Native GADI2spreading groundsmoke · Onagraceae 4 counties - Gayophytum diffusum Torr. & A. Gray ssp. diffusum Native GADIDspreading groundsmoke · Onagraceae 1 county
- Gayophytum diffusum Torr. & A. Gray ssp. parviflorum F.H. Lewis & Szweykowski Native GADIPspreading groundsmoke · Onagraceae 4 counties
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Gayophytum humile Juss. Native GAHU2dwarf groundsmoke · Onagraceae 13 counties -
Gayophytum racemosum Torr. & A. Gray Native GARAblackfoot groundsmoke · Onagraceae 2 counties -
Gayophytum ramosissimum Torr. & A. Gray Native GARA2pinyon groundsmoke · Onagraceae 10 counties -
Gentiana affinis Griseb. Native GEAFpleated gentian · Gentianaceae 18 counties -
Gentiana algida Pall. Native GEAL2whitish gentian · Gentianaceae 5 counties -
Gentiana calycosa Griseb. Native GECARainier pleated gentian · Gentianaceae 10 counties -
Gentiana fremontii Torr. Native GEFRmoss gentian · Gentianaceae 1 county -
Gentiana glauca Pall. Native GEGLpale gentian · Gentianaceae 1 county -
Gentiana prostrata Haenke Native GEPR3pygmy gentian · Gentianaceae 2 counties -
Gentianella amarella (L.) Börner Native GEAM3autumn dwarf gentian · Gentianaceae 17 counties - Gentianella amarella (L.) Börner ssp. acuta (Michx.) J.M. Gillett Native GEAMAautumn dwarf gentian · Gentianaceae 17 counties
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Gentianella propinqua (Richardson) J.M. Gillett Native GEPR5fourpart dwarf gentian · Gentianaceae 2 counties - Gentianella propinqua (Richardson) J.M. Gillett ssp. propinqua Native GEPRPfourpart dwarf gentian · Gentianaceae 2 counties
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Gentianella tenella (Rottb.) Börner Native GETE4Dane's dwarf gentian · Gentianaceae 1 county - Gentianella tenella (Rottb.) Börner ssp. tenella Native GETETDane's dwarf gentian · Gentianaceae 1 county
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Gentianopsis barbellata (Engelm.) Iltis Native GEBA2perennial fringed gentian · Gentianaceae 2 counties -
Gentianopsis thermalis (Kuntze) Iltis Native GETHRocky Mountain fringed gentian · Gentianaceae 6 counties -
Geranium bicknellii Britton Native GEBI2Bicknell's cranesbill · Geraniaceae 12 counties -
Geranium carolinianum L. Native GECA5Carolina geranium · Geraniaceae 8 counties -
Geranium molle L. Introduced GEMOdovefoot geranium · Geraniaceae 5 counties -
Geranium pusillum L. Introduced GEPU2small geranium · Geraniaceae 9 counties -
Geranium richardsonii Fisch. & Trautv. Native GERIRichardson's geranium · Geraniaceae 20 counties -
Geranium robertianum L. Both GERORobert geranium · Geraniaceae 1 county - Geranium robertianum L. ssp. robertianum Native GEROR2Robert geranium · Geraniaceae 1 county
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Geranium viscosissimum Fisch. & C.A. Mey. ex C.A. Mey. Native GEVI2sticky purple geranium · Geraniaceae 34 counties - Geranium viscosissimum Fisch. & C.A. Mey. ex C.A. Mey. var. incisum (Torr. & A. Gray) N.H. Holmgren Native GEVIIsticky purple geranium · Geraniaceae 2 counties
- Geranium viscosissimum Fisch. & C.A. Mey. ex C.A. Mey. var. viscosissimum Native GEVIVsticky purple geranium · Geraniaceae 3 counties
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Geum aleppicum Jacq. Native GEAL3yellow avens · Rosaceae 21 counties -
Geum canadense Jacq. Native GECA7white avens · Rosaceae 2 counties - Geum canadense Jacq. var. canadense Native GECAC6white avens · Rosaceae 2 counties
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Geum macrophyllum Willd. Native GEMA4largeleaf avens · Rosaceae 17 counties - Geum macrophyllum Willd. var. perincisum (Rydb.) Raup Native GEMAPlargeleaf avens · Rosaceae 3 counties
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Geum rivale L. Native GERI2purple avens · Rosaceae 8 counties -
Geum rossii (R. Br.) Ser. Native GERO2Ross' avens · Rosaceae 11 counties - Geum rossii (R. Br.) Ser. var. turbinatum (Rydb.) C.L. Hitchc. Native GEROTRoss' avens · Rosaceae 2 counties
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Geum triflorum Pursh Native GETRold man's whiskers · Rosaceae 40 counties - Geum triflorum Pursh var. ciliatum (Pursh) Fassett Native GETRC2old man's whiskers · Rosaceae 2 counties
- Geum triflorum Pursh var. triflorum Native GETRTold man's whiskers · Rosaceae 4 counties
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Gilia tweedyi Rydb. Native GITWTweedy's gila · Polemoniaceae 1 county -
Githopsis specularioides Nutt. Native GISP3common bluecup · Campanulaceae 1 county -
Glaucium corniculatum (L.) J.H. Rudolph Introduced GLCO3blackspot hornpoppy · Papaveraceae 1 county -
Glaux maritima L. Native GLMAsea milkwort · Primulaceae 7 counties -
Glechoma hederacea L. Introduced GLHE2ground ivy · Lamiaceae 25 counties -
Gleditsia triacanthos L. Native GLTRhoneylocust · Fabaceae 1 county -
Glyceria borealis (Nash) Batchelder Native GLBOsmall floating mannagrass · Poaceae 2 counties -
Glyceria grandis S. Watson Native GLGRAmerican mannagrass · Poaceae 5 counties - Glyceria grandis S. Watson var. grandis Native GLGRGAmerican mannagrass · Poaceae 5 counties
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Glyceria striata (Lam.) Hitchc. Native GLSTfowl mannagrass · Poaceae 6 counties -
Glycyrrhiza lepidota Pursh Native GLLE3American licorice · Fabaceae 45 counties -
Gnaphalium palustre Nutt. Native GNPAwestern marsh cudweed · Asteraceae 11 counties -
Gnaphalium uliginosum L. Introduced GNULmarsh cudweed · Asteraceae 2 counties -
Goodyera oblongifolia Raf. Native GOOB2western rattlesnake plantain · Orchidaceae 8 counties -
Goodyera repens (L.) R. Br. Native GORE2lesser rattlesnake plantain · Orchidaceae 2 counties -
Gratiola ebracteata Benth. ex A. DC. Native GREBbractless hedgehyssop · Scrophulariaceae 2 counties -
Gratiola neglecta Torr. Native GRNEclammy hedgehyssop · Scrophulariaceae 4 counties -
Grayia spinosa (Hook.) Moq. Native GRSPspiny hopsage · Chenopodiaceae 7 counties -
Grindelia squarrosa (Pursh) Dunal Native GRSQcurlycup gumweed · Asteraceae 53 counties - Grindelia squarrosa (Pursh) Dunal var. quasiperennis Lunell Native GRSQQcurlycup gumweed · Asteraceae 6 counties
- Grindelia squarrosa (Pursh) Dunal var. serrulata (Rydb.) Steyerm. Native GRSQScurlycup gumweed · Asteraceae 1 county
- Grindelia squarrosa (Pursh) Dunal var. squarrosa Native GRSQS2curlycup gumweed · Asteraceae 4 counties
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Gutierrezia sarothrae (Pursh) Britton & Rusby Native GUSA2broom snakeweed · Asteraceae 48 counties -
Gymnocarpium disjunctum (Rupr.) Ching Native GYDI2Pacific oakfern · Dryopteridaceae 1 county -
Gymnocarpium dryopteris (L.) Newman Native GYDRwestern oakfern · Dryopteridaceae 1 county -
Gymnosteris parvula A. Heller Native GYPA2smallflower gymnosteris · Polemoniaceae 1 county -
Gypsophila paniculata L. Introduced GYPAbaby's breath · Caryophyllaceae 21 counties -
Hackelia cinerea (Piper) I.M. Johnst. Native HACI2gray stickseed · Boraginaceae 4 counties -
Hackelia deflexa (Wahlenb.) Opiz Native HADEnodding stickseed · Boraginaceae 12 counties - Hackelia deflexa (Wahlenb.) Opiz var. americana (A. Gray) Fernald & I.M. Johnst. Native HADEAAmerican stickseed · Boraginaceae 12 counties
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Hackelia floribunda (Lehm.) I.M. Johnst. Native HAFL2manyflower stickseed · Boraginaceae 22 counties -
Hackelia micrantha (Eastw.) J.L. Gentry Native HAMIJessica sticktight · Boraginaceae 1 county -
Hackelia patens (Nutt.) I.M. Johnst. Native HAPAspotted stickseed · Boraginaceae 6 counties - Hackelia patens (Nutt.) I.M. Johnst. var. patens Native HAPAPspotted stickseed · Boraginaceae 6 counties
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Halenia deflexa (Sm.) Griseb. Native HADE2American spurred gentian · Gentianaceae 1 county - Halenia deflexa (Sm.) Griseb. ssp. deflexa Native HADED2American spurred gentian · Gentianaceae 1 county
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Halimodendron halodendron (Pall.) Voss Introduced HAHA8common salttree · Fabaceae 1 county -
Halimolobos virgata (Nutt.) O.E. Schulz Native HAVI3rod halimolobos · Brassicaceae 1 county -
Halogeton glomeratus (M. Bieb.) C.A. Mey. Introduced HAGLsaltlover · Chenopodiaceae 5 counties -
Hedeoma drummondii Benth. Native HEDRDrummond's false pennyroyal · Lamiaceae 21 counties -
Hedeoma hispida Pursh Native HEHIrough false pennyroyal · Lamiaceae 16 counties -
Hedysarum alpinum L. Native HEALalpine sweetvetch · Fabaceae 4 counties -
Hedysarum boreale Nutt. Native HEBOUtah sweetvetch · Fabaceae 25 counties - Hedysarum boreale Nutt. ssp. boreale Native HEBOBUtah sweetvetch · Fabaceae 25 counties
- Hedysarum boreale Nutt. ssp. boreale var. boreale Native HEBOB2Utah sweetvetch · Fabaceae 25 counties
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Hedysarum occidentale Greene Native HEOCwestern sweetvetch · Fabaceae 7 counties - Hedysarum occidentale Greene var. occidentale Native HEOCO2western sweetvetch · Fabaceae 7 counties
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Hedysarum sulphurescens Rydb. Native HESUwhite sweetvetch · Fabaceae 18 counties -
Helenium autumnale L. Native HEAUcommon sneezeweed · Asteraceae 10 counties - Helenium autumnale L. var. montanum (Nutt.) Fernald Native HEAUMmountain sneezeweed · Asteraceae 9 counties
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Helianthella quinquenervis (Hook.) A. Gray Native HEQU2fivenerve helianthella · Asteraceae 4 counties -
Helianthella uniflora (Nutt.) Torr. & A. Gray Native HEUNoneflower helianthella · Asteraceae 13 counties - Helianthella uniflora (Nutt.) Torr. & A. Gray var. uniflora Native HEUNUoneflower helianthella · Asteraceae 2 counties
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Helianthus annuus L. Native HEAN3common sunflower · Asteraceae 35 counties -
Helianthus maximiliani Schrad. Native HEMA2Maximilian sunflower · Asteraceae 8 counties -
Helianthus nuttallii Torr. & A. Gray Native HENUNuttall's sunflower · Asteraceae 20 counties - Helianthus nuttallii Torr. & A. Gray ssp. nuttallii Native HENUNNuttall's sunflower · Asteraceae 3 counties
- Helianthus nuttallii Torr. & A. Gray ssp. rydbergii (Britton) R.W. Long Native HENURRydberg's sunflower · Asteraceae 1 county
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Helianthus pauciflorus Nutt. Native HEPA19stiff sunflower · Asteraceae 12 counties - Helianthus pauciflorus Nutt. ssp. subrhomboideus (Rydb.) O. Spring & E. Schilling Native HEPASstiff sunflower · Asteraceae 12 counties
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Helianthus petiolaris Nutt. Native HEPEprairie sunflower · Asteraceae 33 counties - Helianthus petiolaris Nutt. ssp. petiolaris Native HEPEPprairie sunflower · Asteraceae 33 counties
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Helianthus tuberosus L. Native HETUJerusalem artichoke · Asteraceae 1 county - Helianthus ×laetiflorus Pers. (pro sp.) [pauciflorus × tuberosus] Native HELAcheerful sunflower · Asteraceae 5 counties
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Heliomeris multiflora Nutt. Native HEMU3showy goldeneye · Asteraceae 5 counties - Heliomeris multiflora Nutt. var. multiflora Native HEMUMshowy goldeneye · Asteraceae 5 counties
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Heliotropium curassavicum L. Native HECU3salt heliotrope · Boraginaceae 11 counties - Heliotropium curassavicum L. var. obovatum DC. Native HECUO2seaside heliotrope · Boraginaceae 11 counties
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Hemerocallis fulva (L.) L. Introduced HEFUorange daylily · Liliaceae 1 county -
Heracleum maximum W. Bartram Native HEMA80common cowparsnip · Apiaceae 26 counties -
Hesperis matronalis L. Introduced HEMA3dames rocket · Brassicaceae 34 counties -
Hesperochiron californicus (Benth.) S. Watson Native HECA7California hesperochiron · Hydrophyllaceae 1 county -
Hesperochiron pumilus (Douglas ex Griseb.) Porter Native HEPU6dwarf hesperochiron · Hydrophyllaceae 3 counties -
Hesperostipa comata (Trin. & Rupr.) Barkworth Native HECO26needle and thread · Poaceae 18 counties - Hesperostipa comata (Trin. & Rupr.) Barkworth ssp. comata Native HECOC8needle and thread · Poaceae 18 counties
- Hesperostipa comata (Trin. & Rupr.) Barkworth ssp. intermedia (Scribn. & Tweedy) Barkworth Native HECOIintermediate needle and thread · Poaceae 2 counties
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Hesperostipa curtiseta (Hitchc.) Barkworth Native HECU9shortbristle needle and thread · Poaceae 2 counties -
Hesperostipa spartea (Trin.) Barkworth Native HESP11porcupinegrass · Poaceae 2 counties -
Heterocodon rariflorum Nutt. Native HERA3rareflower heterocodon · Campanulaceae 1 county -
Heterotheca villosa (Pursh) Shinners Native HEVI4hairy false goldenaster · Asteraceae 54 counties - Heterotheca villosa (Pursh) Shinners var. depressa (Rydb.) Semple Native HEVIDhairy false goldenaster · Asteraceae 1 county
- Heterotheca villosa (Pursh) Shinners var. minor (Hook.) Semple Native HEVIM3hairy false goldenaster · Asteraceae 19 counties
- Heterotheca villosa (Pursh) Shinners var. nana (A. Gray) Semple Native HEVINhairy false goldenaster · Asteraceae 3 counties
- Heterotheca villosa (Pursh) Shinners var. villosa Native HEVIVhairy false goldenaster · Asteraceae 53 counties
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Heuchera cylindrica Douglas ex Hook. Native HECY2roundleaf alumroot · Saxifragaceae 16 counties - Heuchera cylindrica Douglas ex Hook. var. cylindrica Native HECYCroundleaf alumroot · Saxifragaceae 1 county
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Heuchera grossulariifolia Rydb. Native HEGR8gooseberryleaf alumroot · Saxifragaceae 7 counties - Heuchera grossulariifolia Rydb. var. grossulariifolia Native HEGRGgooseberryleaf alumroot · Saxifragaceae 7 counties
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Heuchera parvifolia Nutt. ex Torr. & A. Gray Native HEPA11littleleaf alumroot · Saxifragaceae 14 counties - Heuchera parvifolia Nutt. ex Torr. & A. Gray var. utahensis (Rydb.) Garrett Native HEPAUUtah alumroot · Saxifragaceae 12 counties
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Heuchera richardsonii R. Br. Native HERIRichardson's alumroot · Saxifragaceae 10 counties -
Hibiscus trionum L. Introduced HITRflower of an hour · Malvaceae 10 counties -
Hieracium albiflorum Hook. Native HIAL2white hawkweed · Asteraceae 11 counties -
Hieracium aurantiacum L. Introduced HIAUorange hawkweed · Asteraceae 13 counties -
Hieracium caespitosum Dumort. Introduced HICA10meadow hawkweed · Asteraceae 9 counties -
Hieracium cynoglossoides Arv.-Touv. Native HICYhoundstongue hawkweed · Asteraceae 16 counties -
Hieracium gracile Hook. Native HIGRslender hawkweed · Asteraceae 11 counties - Hieracium gracile Hook. var. gracile Native HIGRGslender hawkweed · Asteraceae 11 counties
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Hieracium piloselloides Vill. Introduced HIPI2tall hawkweed · Asteraceae 2 counties -
Hieracium scouleri Hook. Native HISC2Scouler's woollyweed · Asteraceae 2 counties - Hieracium scouleri Hook. var. scouleri Native HISCS2Scouler's woollyweed · Asteraceae 1 county
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Hieracium umbellatum L. Native HIUMnarrowleaf hawkweed · Asteraceae 16 counties -
Hieracium ×floribundum Wimm. & Grab. (pro sp.) [caespitosum × lactucella] Introduced HIFL3hawkweed · Asteraceae 1 county -
Hierochloe hirta (Schrank) Borbás Native HIHInorthern sweetgrass · Poaceae 2 counties - Hierochloe hirta (Schrank) Borbás ssp. arctica (J. Presl) G. Weim. Native HIHIAnorthern sweetgrass · Poaceae 2 counties
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Hippuris vulgaris L. Native HIVU2common mare's-tail · Hippuridaceae 12 counties -
Holcus lanatus L. Introduced HOLAcommon velvetgrass · Poaceae 3 counties -
Holodiscus discolor (Pursh) Maxim. Native HODIoceanspray · Rosaceae 14 counties -
Holosteum umbellatum L. Introduced HOUMjagged chickweed · Caryophyllaceae 5 counties -
Hordeum brachyantherum Nevski Native HOBR2meadow barley · Poaceae 8 counties - Hordeum brachyantherum Nevski ssp. brachyantherum Native HOBRB2meadow barley · Poaceae 8 counties
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Hordeum jubatum L. Native HOJUfoxtail barley · Poaceae 24 counties - Hordeum jubatum L. ssp. intermedium Bowden Native HOJUIintermediate barley · Poaceae 4 counties
- Hordeum jubatum L. ssp. jubatum Native HOJUJfoxtail barley · Poaceae 3 counties
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Hordeum marinum Huds. Introduced HOMA2seaside barley · Poaceae 2 counties - Hordeum marinum Huds. ssp. gussoneanum (Parl.) Thell. Introduced HOMAGMediterranean barley · Poaceae 2 counties
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Hordeum pusillum Nutt. Native HOPUlittle barley · Poaceae 3 counties -
Hordeum vulgare L. Introduced HOVUcommon barley · Poaceae 7 counties -
Horkelia fusca Lindl. Native HOFUpinewoods horkelia · Rosaceae 1 county - Horkelia fusca Lindl. ssp. parviflora (Nutt. ex Torr. & A. Gray) D.D. Keck Native HOFUP2smallflower horkelia · Rosaceae 1 county
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Hulsea algida A. Gray Native HUALPacific hulsea · Asteraceae 4 counties -
Humulus lupulus L. Both HULUcommon hop · Cannabaceae 14 counties - Humulus lupulus L. var. neomexicanus A. Nelson & Cockerell Native HULUNcommon hop · Cannabaceae 2 counties
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Hydrophyllum capitatum Douglas ex Benth. Native HYCA4ballhead waterleaf · Hydrophyllaceae 9 counties - Hydrophyllum capitatum Douglas ex Benth. var. capitatum Native HYCACballhead waterleaf · Hydrophyllaceae 9 counties
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Hymenopappus filifolius Hook. Native HYFIfineleaf hymenopappus · Asteraceae 28 counties - Hymenopappus filifolius Hook. var. polycephalus (Osterh.) B.L. Turner Native HYFIP3manyhead hymenopappus · Asteraceae 18 counties
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Hymenopappus tenuifolius Pursh Native HYTE2Chalk Hill hymenopappus · Asteraceae 1 county -
Hymenoxys hoopesii (A. Gray) Bierner Native HYHOowl's-claws · Asteraceae 1 county -
Hymenoxys richardsonii (Hook.) Cockerell Native HYRIpingue rubberweed · Asteraceae 25 counties - Hymenoxys richardsonii (Hook.) Cockerell var. richardsonii Native HYRIRpingue rubberweed · Asteraceae 25 counties
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Hyoscyamus niger L. Introduced HYNIblack henbane · Solanaceae 42 counties -
Hypericum perforatum L. Introduced HYPEcommon St. Johnswort · Clusiaceae 27 counties -
Hypericum scouleri Hook. Native HYSC5Scouler's St. Johnswort · Clusiaceae 15 counties - Hypericum scouleri Hook. ssp. scouleri Native HYSCS2Scouler's St. Johnswort · Clusiaceae 1 county
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Hypochaeris radicata L. Introduced HYRA3hairy cat's ear · Asteraceae 2 counties -
Hyssopus officinalis L. Introduced HYOFhyssop · Lamiaceae 2 counties -
Iliamna rivularis (Douglas ex Hook.) Greene Native ILRIstreambank wild hollyhock · Malvaceae 14 counties -
Impatiens aurella Rydb. Native IMAUpaleyellow touch-me-not · Balsaminaceae 3 counties -
Impatiens ecornuta Gerry Moore, Zika & Rushworth Native IMEC2spurless touch-me-not · Balsaminaceae 2 counties -
Ionactis alpina (Nutt.) Greene Native IOALLava aster · Asteraceae 7 counties -
Ionactis stenomeres (A. Gray) Greene Native IOSTRocky Mountain aster · Asteraceae 6 counties -
Ipomoea leptophylla Torr. Native IPLEbush morning-glory · Convolvulaceae 4 counties -
Ipomopsis aggregata (Pursh) V.E. Grant Native IPAGscarlet gilia · Polemoniaceae 10 counties - Ipomopsis aggregata (Pursh) V.E. Grant ssp. aggregata Native IPAGA3scarlet gilia · Polemoniaceae 10 counties
- Ipomopsis aggregata (Pursh) V.E. Grant ssp. attenuata (A. Gray) V.E. Grant & A.D. Grant Native IPAGA2scarlet gilia · Polemoniaceae 1 county
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Ipomopsis congesta (Hook.) V.E. Grant Native IPCO5ballhead ipomopsis · Polemoniaceae 9 counties - Ipomopsis congesta (Hook.) V.E. Grant ssp. congesta Native IPCOC3ballhead ipomopsis · Polemoniaceae 8 counties
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Ipomopsis pumila (Nutt.) V.E. Grant Native IPPU4dwarf ipomopsis · Polemoniaceae 1 county -
Ipomopsis spicata (Nutt.) V.E. Grant Native IPSPspiked ipomopsis · Polemoniaceae 11 counties - Ipomopsis spicata (Nutt.) V.E. Grant ssp. orchidacea (Brand) Wilken & R.L. Hartm. Native IPSPO2orchid ipomopsis · Polemoniaceae 2 counties
- Ipomopsis spicata (Nutt.) V.E. Grant ssp. orchidacea (Brand) Wilken & R.L. Hartm. var. cephaloidea (Rydb.) Wilken & R.L. Hartm. Native IPSPC2orchid ipomopsis · Polemoniaceae 2 counties
- Ipomopsis spicata (Nutt.) V.E. Grant ssp. orchidacea (Brand) Wilken & R.L. Hartm. var. orchidacea (Brand) Dorn Native IPSPO3orchid ipomopsis · Polemoniaceae 1 county
- Ipomopsis spicata (Nutt.) V.E. Grant ssp. robruthii Wilken & R.L. Hartm. Native IPSPR3spiked ipomopsis · Polemoniaceae 1 county
- Ipomopsis spicata (Nutt.) V.E. Grant ssp. spicata Native IPSPSspiked ipomopsis · Polemoniaceae 10 counties
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Iris missouriensis Nutt. Native IRMIRocky Mountain iris · Iridaceae 1 county -
Iris pseudacorus L. Introduced IRPSpaleyellow iris · Iridaceae 2 counties -
Isatis tinctoria L. Introduced ISTIDyer's woad · Brassicaceae 13 counties -
Isoetes bolanderi Engelm. Native ISBOBolander's quillwort · Isoetaceae 2 counties - Isoetes ×herb-wagneri W.C. Taylor [bolanderi × echinospora] Native ISHE2quillwort · Isoetaceae 1 county
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Iva axillaris Pursh Native IVAXpovertyweed · Asteraceae 37 counties -
Ivesia gordonii (Hook.) Torr. & A. Gray Native IVGOGordon's ivesia · Rosaceae 9 counties - Juncus albescens (Lange) Fernald Native JUAL2northern white rush · Juncaceae 2 counties
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Juncus alpinoarticulatus Chaix Native JUAL4northern green rush · Juncaceae 5 counties - Juncus alpinoarticulatus Chaix ssp. nodulosus (Wahlenb.) Hämet-Ahti Native JUALNnorthern green rush · Juncaceae 5 counties
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Juncus ambiguus Guss. Native JUAM3seasice rush · Juncaceae 1 county -
Juncus arcticus Willd. Both JUAR2arctic rush · Juncaceae 30 counties - Juncus arcticus Willd. ssp. littoralis (Engelm.) Hultén Native JUARLmountain rush · Juncaceae 30 counties
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Juncus articulatus L. Native JUAR4jointleaf rush · Juncaceae 1 county -
Juncus biglumis L. Native JUBI2twoflowered rush · Juncaceae 1 county -
Juncus bufonius L. Native JUBUtoad rush · Juncaceae 22 counties - Juncus bufonius L. var. bufonius Native JUBUBtoad rush · Juncaceae 19 counties
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Juncus castaneus Sm. Native JUCA6chestnut rush · Juncaceae 1 county - Juncus castaneus Sm. ssp. castaneus Native JUCAC2chestnut rush · Juncaceae 1 county
- Juncus castaneus Sm. ssp. castaneus var. castaneus Native JUCAC6chestnut rush · Juncaceae 1 county
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Juncus confusus Coville Native JUCO2Colorado rush · Juncaceae 9 counties -
Juncus drummondii E. Mey. Native JUDRDrummond's rush · Juncaceae 10 counties - Juncus drummondii E. Mey. var. drummondii Native JUDRDDrummond's rush · Juncaceae 1 county
- Juncus drummondii E. Mey. var. subtriflorus (E. Mey.) C.L. Hitchc. Native JUDRSthreeflower rush · Juncaceae 1 county
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Juncus dudleyi Wiegand Native JUDU2Dudley's rush · Juncaceae 7 counties -
Juncus effusus L. Native JUEFcommon rush · Juncaceae 1 county -
Juncus ensifolius Wikstr. Native JUENswordleaf rush · Juncaceae 15 counties -
Juncus filiformis L. Native JUFIthread rush · Juncaceae 3 counties -
Juncus gerardii Loisel. Native JUGEsaltmeadow rush · Juncaceae 1 county - Juncus gerardii Loisel. var. gerardii Native JUGEGsaltmeadow rush · Juncaceae 1 county
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Juncus hallii Engelm. Native JUHAHall's rush · Juncaceae 1 county -
Juncus interior Wiegand Native JUIN2inland rush · Juncaceae 4 counties - Juncus interior Wiegand var. interior Native JUINIinland rush · Juncaceae 2 counties
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Juncus longistylis Torr. Native JULOlongstyle rush · Juncaceae 15 counties - Juncus longistylis Torr. var. longistylis Native JULOLlongstyle rush · Juncaceae 13 counties
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Juncus mertensianus Bong. Native JUME3Mertens' rush · Juncaceae 11 counties -
Juncus nevadensis S. Watson Native JUNESierra rush · Juncaceae 1 county - Juncus nevadensis S. Watson var. badius (Suksd.) C.L. Hitchc. Native JUNEBSierra rush · Juncaceae 1 county
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Juncus nodosus L. Native JUNO2knotted rush · Juncaceae 12 counties - Juncus nodosus L. var. nodosus Native JUNONknotted rush · Juncaceae 12 counties
- Juncus parryi Engelm. Native JUPAParry's rush · Juncaceae 14 counties
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Juncus regelii Buchenau Native JURERegel's rush · Juncaceae 7 counties -
Juncus saximontanus A. Nelson Native JUSARocky Mountain rush · Juncaceae 3 counties -
Juncus tenuis Willd. Native JUTEpoverty rush · Juncaceae 9 counties - Juncus torreyi Coville Native JUTOTorrey's rush · Juncaceae 17 counties
- Juncus tracyi Rydb. Native JUTRTracy's rush · Juncaceae 3 counties
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Juncus tweedyi Rydb. Native JUTWTweedy's rush · Juncaceae 2 counties -
Juncus vaseyi Engelm. Native JUVAVasey's rush · Juncaceae 1 county -
Juniperus communis L. Native JUCO6common juniper · Cupressaceae 28 counties - Juniperus communis L. var. depressa Pursh Native JUCODcommon juniper · Cupressaceae 28 counties
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Juniperus horizontalis Moench Native JUHO2creeping juniper · Cupressaceae 25 counties -
Juniperus scopulorum Sarg. Native JUSC2Rocky Mountain juniper · Cupressaceae 16 counties -
Kalmia microphylla (Hook.) A. Heller Native KAMIalpine laurel · Ericaceae 2 counties - Kalmia polifolia Wangenh. Native KAPObog laurel · Ericaceae 14 counties
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Kelloggia galioides Torr. Native KEGAmilk kelloggia · Rubiaceae 2 counties -
Kelseya uniflora (S. Watson) Rydb. Native KEUNoneflower kelseya · Rosaceae 3 counties -
Knautia arvensis (L.) J.M. Coult. Introduced KNARfield scabiosa · Dipsacaceae 16 counties -
Kobresia myosuroides (Vill.) Fiori Native KOMYBellardi bog sedge · Cyperaceae 1 county -
Kobresia sibirica (Turcz. ex Ledeb.) Boeckeler Native KOSISiberian bog sedge · Cyperaceae 2 counties -
Kobresia simpliciuscula (Wahlenb.) Mack. Native KOSI2simple bog sedge · Cyperaceae 1 county -
Koeleria macrantha (Ledeb.) Schult. Native KOMAprairie Junegrass · Poaceae 18 counties -
Koenigia islandica L. Native KOISisland purslane · Polygonaceae 1 county -
Krascheninnikovia lanata (Pursh) A. Meeuse & Smit Native KRLA2winterfat · Chenopodiaceae 35 counties -
Lactuca biennis (Moench) Fernald Native LABItall blue lettuce · Asteraceae 3 counties -
Lactuca canadensis L. Native LACACanada lettuce · Asteraceae 3 counties -
Lactuca ludoviciana (Nutt.) Riddell Native LALUbiannual lettuce · Asteraceae 3 counties -
Lactuca serriola L. Introduced LASEprickly lettuce · Asteraceae 56 counties -
Lactuca tatarica (L.) C.A. Mey. Native LATAblue lettuce · Asteraceae 44 counties - Lactuca tatarica (L.) C.A. Mey. var. pulchella (Pursh) Breitung Native LATAPblue lettuce · Asteraceae 44 counties
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Lamium amplexicaule L. Introduced LAAMhenbit deadnettle · Lamiaceae 20 counties -
Lamium purpureum L. Introduced LAPU2purple deadnettle · Lamiaceae 3 counties - Lamium purpureum L. var. purpureum Introduced LAPUPpurple deadnettle · Lamiaceae 3 counties
- Lappula cenchrusoides A. Nelson Native LACEGreat Plains stickseed · Boraginaceae 9 counties
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Lappula occidentalis (S. Watson) Greene Native LAOC3flatspine stickseed · Boraginaceae 45 counties - Lappula occidentalis (S. Watson) Greene var. cupulata (A. Gray) Higgins Native LAOCCflatspine stickseed · Boraginaceae 3 counties
- Lappula occidentalis (S. Watson) Greene var. occidentalis Native LAOCOflatspine stickseed · Boraginaceae 44 counties
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Lappula squarrosa (Retz.) Dumort. Introduced LASQEuropean stickseed · Boraginaceae 37 counties -
Lapsana communis L. Introduced LACO3common nipplewort · Asteraceae 1 county -
Larix lyallii Parl. Native LALYsubalpine larch · Pinaceae 4 counties -
Larix occidentalis Nutt. Native LAOCwestern larch · Pinaceae 6 counties -
Lathrocasis tenerrima (A. Gray) L.A. Johnson Native LATE6delicate gilia · Polemoniaceae 3 counties - Lathyrus bijugatus T.G. White Native LABI2drypark pea · Fabaceae 1 county
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Lathyrus latifolius L. Introduced LALA4perennial pea · Fabaceae 6 counties -
Lathyrus ochroleucus Hook. Native LAOC2cream pea · Fabaceae 15 counties -
Lathyrus tuberosus L. Introduced LATUtuberous sweetpea · Fabaceae 4 counties -
Ledum glandulosum Nutt. Native LEGLwestern Labrador tea · Ericaceae 14 counties -
Lemna gibba L. Native LEGIswollen duckweed · Lemnaceae 1 county -
Lemna minor L. Native LEMI3common duckweed · Lemnaceae 10 counties -
Lemna trisulca L. Native LETRstar duckweed · Lemnaceae 7 counties -
Lemna turionifera Landolt Native LETU2turion duckweed · Lemnaceae 2 counties -
Lemna valdiviana Phil. Native LEVAvaldivia duckweed · Lemnaceae 1 county -
Leonurus cardiaca L. Introduced LECA2common motherwort · Lamiaceae 11 counties - Leonurus cardiaca L. ssp. cardiaca Introduced LECAC7common motherwort · Lamiaceae 11 counties
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Lepidium campestre (L.) W.T. Aiton Introduced LECA5field pepperweed · Brassicaceae 19 counties -
Lepidium densiflorum Schrad. Both LEDEcommon pepperweed · Brassicaceae 34 counties -
Lepidium latifolium L. Introduced LELA2broadleaved pepperweed · Brassicaceae 16 counties -
Lepidium montanum Nutt. Native LEMO2mountain pepperweed · Brassicaceae 1 county - Lepidium montanum Nutt. var. montanum Native LEMOMmountain pepperweed · Brassicaceae 1 county
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Lepidium perfoliatum L. Introduced LEPE2clasping pepperweed · Brassicaceae 48 counties -
Lepidium ramosissimum A. Nelson Native LERA2manybranched pepperweed · Brassicaceae 7 counties - Lepidium ramosissimum A. Nelson var. bourgeauanum (Thell.) Rollins Native LERAB2Bourgeau's pepperweed · Brassicaceae 1 county
- Lepidium ramosissimum A. Nelson var. ramosissimum Native LERAR3manybranched pepperweed · Brassicaceae 1 county
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Lepidium sativum L. Introduced LESA2gardencress pepperweed · Brassicaceae 3 counties -
Lepidium virginicum L. Native LEVI3Virginia pepperweed · Brassicaceae 3 counties - Lepidium virginicum L. var. pubescens (Greene) Thell. Native LEVIPhairy pepperweed · Brassicaceae 3 counties
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Leptarrhena pyrolifolia (D. Don) R. Br. ex Ser. Native LEPYfireleaf leptarrhena · Saxifragaceae 1 county -
Leptochloa fusca (L.) Kunth Native LEFU21Malabar sprangletop · Poaceae 1 county - Leptochloa fusca (L.) Kunth ssp. fascicularis (Lam.) N. Snow Native LEFUFbearded sprangletop · Poaceae 1 county
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Leptosiphon nuttallii (A. Gray) J.M. Porter & L.A. Johnson Native LENU8Nuttall's linanthus · Polemoniaceae 1 county - Leptosiphon nuttallii (A. Gray) J.M. Porter & L.A. Johnson ssp. nuttallii Native LENUNNuttall's linanthus · Polemoniaceae 1 county
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Leptosiphon septentrionalis (H. Mason) J.M. Porter & L.A. Johnson Native LESE17northern linanthus · Polemoniaceae 13 counties -
Lesquerella alpina (Nutt.) S. Watson Native LEALalpine bladderpod · Brassicaceae 41 counties - Lesquerella alpina (Nutt.) S. Watson var. alpina Native LEALA5alpine bladderpod · Brassicaceae 2 counties
- Lesquerella alpina (Nutt.) S. Watson var. spatulata (Rydb.) Payson Native LEALSalpine bladderpod · Brassicaceae 3 counties
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Lesquerella arenosa (Richardson) Rydb. Native LEAR6Great Plains bladderpod · Brassicaceae 5 counties - Lesquerella arenosa (Richardson) Rydb. var. arenosa Native LEARA2Great Plains bladderpod · Brassicaceae 5 counties
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Lesquerella carinata Rollins Native LECA10Idaho bladderpod · Brassicaceae 1 county - Lesquerella carinata Rollins var. carinata Native LECAC5Idaho bladderpod · Brassicaceae 1 county
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Lesquerella ludoviciana (Nutt.) S. Watson Native LELUfoothill bladderpod · Brassicaceae 24 counties - Lesquerella paysonii Rollins Native LEPA8Payson's bladderpod · Brassicaceae 1 county
- Lesquerella pulchella Rollins Native LEPU15beautiful bladderpod · Brassicaceae 1 county
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Leucanthemum vulgare Lam. Introduced LEVUoxeye daisy · Asteraceae 29 counties -
Leucocrinum montanum Nutt. ex A. Gray Native LEMO4common starlily · Liliaceae 18 counties -
Leucopoa kingii (S. Watson) W.A. Weber Native LEKI2spike fescue · Poaceae 2 counties -
Lewisia columbiana (Howell ex A. Gray) B.L. Rob. Native LECO3Columbian lewisia · Portulacaceae 1 county - Lewisia columbiana (Howell ex A. Gray) B.L. Rob. var. wallowensis C.L. Hitchc. Native LECOWWallowa lewisia · Portulacaceae 1 county
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Lewisia pygmaea (A. Gray) B.L. Rob. Native LEPY2alpine lewisia · Portulacaceae 12 counties -
Lewisia rediviva Pursh Native LERE7bitter root · Portulacaceae 21 counties - Lewisia rediviva Pursh var. rediviva Native LERERbitter root · Portulacaceae 20 counties
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Lewisia triphylla (S. Watson) B.L. Rob. Native LETR2threeleaf lewisia · Portulacaceae 2 counties -
Leymus cinereus (Scribn. & Merr.) Á. Löve Native LECI4basin wildrye · Poaceae 4 counties - Leymus multicaulis (Kar. & Kir.) Tzvelev Introduced LEMU11manystem wildrye · Poaceae 1 county
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Liatris ligulistylis (A. Nelson) K. Schum. Native LILIRocky Mountain blazing star · Asteraceae 2 counties -
Liatris punctata Hook. Native LIPUdotted blazing star · Asteraceae 42 counties - Liatris punctata Hook. var. punctata Native LIPUPdotted blazing star · Asteraceae 42 counties
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Ligusticum canbyi (J.M. Coult. & Rose) J.M. Coult. & Rose Native LICA2Canby's licorice-root · Apiaceae 2 counties -
Ligusticum filicinum S. Watson Native LIFIfernleaf licorice-root · Apiaceae 5 counties -
Ligusticum porteri J.M. Coult. & Rose Native LIPOPorter's licorice-root · Apiaceae 1 county - Ligusticum porteri J.M. Coult. & Rose var. porteri Native LIPOPPorter's licorice-root · Apiaceae 1 county
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Ligusticum verticillatum (Hook.) J.M. Coult. & Rose ex Rose Native LIVEnorthern licorice-root · Apiaceae 1 county -
Ligustrum vulgare L. Introduced LIVUEuropean privet · Oleaceae 2 counties -
Lilaea scilloides (Poir.) Hauman Native LISC4awl-leaf lilaea · Juncaginaceae 1 county -
Lilium philadelphicum L. Native LIPHwood lily · Liliaceae 7 counties - Lilium philadelphicum L. var. andinum (Nutt.) Ker Gawl. Native LIPHAwood lily · Liliaceae 7 counties
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Limonium vulgare Mill. Introduced LIVU3Mediterranean sea lavender · Plumbaginaceae 1 county -
Limosella aquatica L. Native LIAQwater mudwort · Scrophulariaceae 8 counties -
Linanthus pungens (Torr.) J.M. Porter & L.A. Johnson Native LIPU11granite prickly phlox · Polemoniaceae 6 counties -
Linaria dalmatica (L.) Mill. Introduced LIDADalmatian toadflax · Scrophulariaceae 47 counties - Linaria dalmatica (L.) Mill. ssp. dalmatica Introduced LIDADDalmatian toadflax · Scrophulariaceae 47 counties
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Linaria vulgaris Mill. Introduced LIVU2butter and eggs · Scrophulariaceae 35 counties -
Linnaea borealis L. Native LIBO3twinflower · Caprifoliaceae 23 counties - Linnaea borealis L. ssp. americana (Forbes) Hultén ex R.T. Clausen Native LIBOAtwinflower · Caprifoliaceae 22 counties
- Linnaea borealis L. ssp. longiflora (Torr.) Hultén Native LIBOL2longtube twinflower · Caprifoliaceae 1 county
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Linum australe A. Heller Native LIAU4southern flax · Linaceae 2 counties - Linum australe A. Heller var. australe Native LIAUAsouthern flax · Linaceae 2 counties
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Linum compactum A. Nelson Native LICO3Wyoming flax · Linaceae 7 counties -
Linum lewisii Pursh Native LILE3Lewis flax · Linaceae 19 counties - Linum lewisii Pursh var. lewisii Native LILEL2prairie flax · Linaceae 19 counties
- Linum perenne L. Introduced LIPE2blue flax · Linaceae 38 counties
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Linum rigidum Pursh Native LIRIstiffstem flax · Linaceae 21 counties - Linum rigidum Pursh var. rigidum Native LIRIRstiffstem flax · Linaceae 21 counties
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Linum usitatissimum L. Introduced LIUScommon flax · Linaceae 10 counties -
Lipocarpha drummondii (Nees) G. Tucker Native LIDR3Drummond's halfchaff sedge · Cyperaceae 1 county -
Listera borealis Morong Native LIBO4northern twayblade · Orchidaceae 4 counties -
Listera caurina Piper Native LICA10northwestern twayblade · Orchidaceae 1 county -
Listera convallarioides (Sw.) Nutt. ex Elliott Native LICO5broadlipped twayblade · Orchidaceae 4 counties -
Listera cordata (L.) R. Br. Native LICO6heartleaf twayblade · Orchidaceae 6 counties - Listera cordata (L.) R. Br. var. nephrophylla (Rydb.) Hultén Native LICONheartleaf twayblade · Orchidaceae 6 counties
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Lithophragma glabrum Nutt. Native LIGL2bulbous woodland-star · Saxifragaceae 13 counties -
Lithophragma parviflorum (Hook.) Nutt. ex Torr. & A. Gray Native LIPA5smallflower woodland-star · Saxifragaceae 3 counties - Lithophragma parviflorum (Hook.) Nutt. ex Torr. & A. Gray var. parviflorum Native LIPAP3smallflower woodland-star · Saxifragaceae 2 counties
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Lithophragma tenellum Nutt. Native LITE4slender woodland-star · Saxifragaceae 22 counties -
Lithospermum incisum Lehm. Native LIIN2narrowleaf stoneseed · Boraginaceae 31 counties -
Lithospermum ruderale Douglas ex Lehm. Native LIRU4western stoneseed · Boraginaceae 28 counties -
Lloydia serotina (L.) Salisb. ex Rchb. Native LLSEcommon alplily · Liliaceae 6 counties - Lloydia serotina (L.) Salisb. ex Rchb. var. serotina Native LLSES2common alplily · Liliaceae 6 counties
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Lobelia kalmii L. Native LOKAOntario lobelia · Campanulaceae 4 counties -
Lobelia spicata Lam. Native LOSPpalespike lobelia · Campanulaceae 3 counties - Lobelia spicata Lam. var. hirtella A. Gray Native LOSPHpalespike lobelia · Campanulaceae 3 counties
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Lobularia maritima (L.) Desv. Introduced LOMAsweet alyssum · Brassicaceae 3 counties -
Logfia arvensis (L.) Holub Introduced LOAR5field cottonrose · Asteraceae 24 counties -
Lolium perenne L. Introduced LOPEperennial ryegrass · Poaceae 20 counties - Lolium perenne L. ssp. multiflorum (Lam.) Husnot Introduced LOPEM2Italian ryegrass · Poaceae 13 counties
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Lolium persicum Boiss. & Hohen. ex Boiss. Introduced LOPE2Persian ryegrass · Poaceae 26 counties -
Lolium temulentum L. Introduced LOTE2Darnel ryegrass · Poaceae 2 counties - Lolium temulentum L. ssp. temulentum Introduced LOTETDarnel ryegrass · Poaceae 2 counties
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Lomatium ambiguum (Nutt.) J.M. Coult. & Rose Native LOAMWyeth biscuitroot · Apiaceae 7 counties -
Lomatium attenuatum Evert Native LOATtapertip desertparsley · Apiaceae 1 county -
Lomatium cous (S. Watson) J.M. Coult. & Rose Native LOCO4cous biscuitroot · Apiaceae 21 counties -
Lomatium cusickii (S. Watson) J.M. Coult. & Rose Native LOCUCusick's biscuitroot · Apiaceae 5 counties -
Lomatium dissectum (Nutt.) Mathias & Constance Native LODIfernleaf biscuitroot · Apiaceae 16 counties - Lomatium dissectum (Nutt.) Mathias & Constance var. multifidum Native LODIMcarrotleaf biscuitroot · Apiaceae 16 counties
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Lomatium foeniculaceum (Nutt.) J.M. Coult. & Rose Native LOFOdesert biscuitroot · Apiaceae 27 counties - Lomatium foeniculaceum (Nutt.) J.M. Coult. & Rose ssp. foeniculaceum Native LOFOF2desert biscuitroot · Apiaceae 10 counties
- Lomatium foeniculaceum (Nutt.) J.M. Coult. & Rose ssp. macdougalii (J.M. Coult. & Rose) W.L. Theobald Native LOFOMMacdougal's biscuitroot · Apiaceae 1 county
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Lomatium macrocarpum (Nutt. ex Torr. & A. Gray) J.M. Coult. & Rose Native LOMA3bigseed biscuitroot · Apiaceae 19 counties -
Lomatium orientale J.M. Coult. & Rose Native LOORNorthern Idaho biscuitroot · Apiaceae 7 counties -
Lomatium sandbergii (J.M. Coult. & Rose) J.M. Coult. & Rose Native LOSA3Sandberg's biscuitroot · Apiaceae 3 counties -
Lomatium simplex (Nutt.) J.F. Macbr. Native LOSI2Great Basin desertparsley · Apiaceae 2 counties - Lomatium simplex (Nutt.) J.F. Macbr. var. simplex Native LOSISGreat Basin desertparsley · Apiaceae 2 counties
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Lomatium triternatum (Pursh) J.M. Coult. & Rose Native LOTR2nineleaf biscuitroot · Apiaceae 36 counties - Lomatium triternatum (Pursh) J.M. Coult. & Rose var. anomalum (M.E. Jones ex J.M. Coult. & Rose) Mathias Native LOTRAbroadnineleaf biscuitroot · Apiaceae 1 county
- Lomatium triternatum (Pursh) J.M. Coult. & Rose var. triternatum Native LOTRTnineleaf biscuitroot · Apiaceae 36 counties
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Lomatogonium rotatum (L.) Fr. ex Fernald Native LOROmarsh felwort · Gentianaceae 8 counties -
Lonicera caerulea L. Native LOCA6sweetberry honeysuckle · Caprifoliaceae 1 county - Lonicera caerulea L. var. cauriana (Fernald) B. Boivin Native LOCAC3bluefly honeysuckle · Caprifoliaceae 1 county
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Lonicera ciliosa (Pursh) Poir. ex DC. Native LOCI3orange honeysuckle · Caprifoliaceae 5 counties -
Lonicera involucrata (Richardson) Banks ex Spreng. Native LOIN5twinberry honeysuckle · Caprifoliaceae 18 counties - Lonicera involucrata (Richardson) Banks ex Spreng. var. involucrata Native LOINItwinberry honeysuckle · Caprifoliaceae 18 counties
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Lonicera tatarica L. Introduced LOTATatarian honeysuckle · Caprifoliaceae 22 counties -
Lonicera utahensis S. Watson Native LOUT2Utah honeysuckle · Caprifoliaceae 9 counties -
Lotus corniculatus L. Introduced LOCO6bird's-foot trefoil · Fabaceae 15 counties - Lotus corniculatus L. var. corniculatus Introduced LOCOC5bird's-foot trefoil · Fabaceae 14 counties
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Lotus tenuis Waldst. & Kit. ex Willd. Introduced LOTE4narrowleaf trefoil · Fabaceae 1 county -
Lotus unifoliolatus (Hook.) Benth. Native LOUNAmerican bird's-foot trefoil · Fabaceae 5 counties - Lotus unifoliolatus (Hook.) Benth. var. unifoliolatus Native LOUNUAmerican bird's-foot trefoil · Fabaceae 5 counties
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Luetkea pectinata (Pursh) Kuntze Native LUPEpartridgefoot · Rosaceae 2 counties -
Lupinus argenteus Pursh Native LUAR3silvery lupine · Fabaceae 50 counties - Lupinus argenteus Pursh ssp. argenteus Native LUARA5silvery lupine · Fabaceae 18 counties
- Lupinus argenteus Pursh ssp. argenteus var. argenteus Native LUARA11silvery lupine · Fabaceae 5 counties
- Lupinus argenteus Pursh ssp. argenteus var. laxiflorus (Douglas ex Lindl.) Dorn Native LUARL5silvery lupine · Fabaceae 13 counties
- Lupinus argenteus Pursh ssp. rubricaulis (Greene) Hess & D. Dunn Native LUARRsilvery lupine · Fabaceae 2 counties
- Lupinus aridus Douglas Native LUAR7desert lupine · Fabaceae 30 counties
- Lupinus aridus Douglas ssp. aridus Native LUARA6desert lupine · Fabaceae 30 counties
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Lupinus bingenensis Suksd. Native LUBI3Bingen lupine · Fabaceae 5 counties - Lupinus bingenensis Suksd. var. subsaccatus Native LUBISBingen lupine · Fabaceae 5 counties
- Lupinus caespitosus Nutt. Native LUCA3stemless dwarf lupine · Fabaceae 2 counties
- Lupinus caespitosus Nutt. var. caespitosus Native LUCAC2stemless dwarf lupine · Fabaceae 2 counties
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Lupinus depressus Rydb. Native LUDE3depressed lupine · Fabaceae 2 counties -
Lupinus leucophyllus Douglas ex Lindl. Native LULE3velvet lupine · Fabaceae 12 counties - Lupinus leucophyllus Douglas ex Lindl. ssp. leucophyllus Native LULEL4velvet lupine · Fabaceae 12 counties
- Lupinus parviflorus Nutt. ex Hook. & Arn. Native LUPA8lodgepole lupine · Fabaceae 6 counties
- Lupinus parviflorus Nutt. ex Hook. & Arn. ssp. parviflorus Native LUPAP4lodgepole lupine · Fabaceae 6 counties
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Lupinus polyphyllus Lindl. Native LUPO2bigleaf lupine · Fabaceae 18 counties - Lupinus polyphyllus Lindl. ssp. polyphyllus Native LUPOP2bigleaf lupine · Fabaceae 18 counties
- Lupinus polyphyllus Lindl. ssp. polyphyllus var. polyphyllus Native LUPOP4bigleaf lupine · Fabaceae 18 counties
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Lupinus pusillus Pursh Native LUPUrusty lupine · Fabaceae 19 counties - Lupinus pusillus Pursh ssp. intermontanus (A. Heller) D. Dunn Native LUPUI2Intermountain lupine · Fabaceae 1 county
- Lupinus pusillus Pursh ssp. pusillus Native LUPUPrusty lupine · Fabaceae 3 counties
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Lupinus sericeus Pursh Native LUSE4silky lupine · Fabaceae 34 counties - Lupinus sericeus Pursh ssp. sericeus Native LUSES2silky lupine · Fabaceae 34 counties
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Lupinus wyethii S. Watson Native LUWYWyeth's lupine · Fabaceae 7 counties - Lupinus wyethii S. Watson ssp. wyethii Native LUWYWWyeth's lupine · Fabaceae 7 counties
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Luzula glabrata (Hoppe ex Rostk.) Desv. Native LUGL2smooth woodrush · Juncaceae 2 counties - Luzula glabrata (Hoppe ex Rostk.) Desv. var. hitchcockii (Hämet-Ahti) Dorn Native LUGLHHitchcock's smooth woodrush · Juncaceae 2 counties
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Luzula multiflora (Ehrh.) Lej. Native LUMU2common woodrush · Juncaceae 1 county - Luzula multiflora (Ehrh.) Lej. ssp. frigida (Buchenau) Krecz. Native LUMUFcommon woodrush · Juncaceae 1 county
- Luzula parviflora (Ehrh.) Desv. Native LUPA4smallflowered woodrush · Juncaceae 2 counties
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Luzula piperi (Coville) M.E. Jones Native LUPI2Piper's woodrush · Juncaceae 1 county -
Luzula spicata (L.) DC. Native LUSP4spiked woodrush · Juncaceae 2 counties -
Lychnis chalcedonica L. Introduced LYCH3maltesecross · Caryophyllaceae 1 county -
Lychnis coronaria (L.) Desr. Introduced LYCOrose campion · Caryophyllaceae 3 counties -
Lychnis flos-cuculi L. Introduced LYFL3ragged robin · Caryophyllaceae 2 counties -
Lycium barbarum L. Introduced LYBA4matrimony vine · Solanaceae 28 counties -
Lycopodium annotinum L. Native LYAN2stiff clubmoss · Lycopodiaceae 2 counties -
Lycopus americanus Muhl. ex W.P.C. Barton Native LYAMAmerican water horehound · Lamiaceae 7 counties -
Lycopus asper Greene Native LYASrough bugleweed · Lamiaceae 12 counties -
Lycopus uniflorus Michx. Native LYUNnorthern bugleweed · Lamiaceae 1 county - Lycopus uniflorus Michx. var. uniflorus Native LYUNU2northern bugleweed · Lamiaceae 1 county
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Lygodesmia juncea (Pursh) D. Don ex Hook. Native LYJUrush skeletonplant · Asteraceae 33 counties -
Lysimachia ciliata L. Native LYCIfringed loosestrife · Primulaceae 21 counties -
Lysimachia thyrsiflora L. Native LYTH2tufted loosestrife · Primulaceae 2 counties -
Lysimachia vulgaris L. Introduced LYVUgarden yellow loosestrife · Primulaceae 3 counties -
Lythrum salicaria L. Introduced LYSA2purple loosestrife · Lythraceae 9 counties -
Machaeranthera canescens (Pursh) A. Gray Native MACA2hoary tansyaster · Asteraceae 34 counties - Machaeranthera canescens (Pursh) A. Gray ssp. canescens Native MACAChoary tansyaster · Asteraceae 34 counties
- Machaeranthera canescens (Pursh) A. Gray ssp. canescens var. canescens Native MACAC3hoary tansyaster · Asteraceae 34 counties
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Machaeranthera grindelioides (Nutt.) Shinners Native MAGR2rayless tansyaster · Asteraceae 25 counties - Machaeranthera grindelioides (Nutt.) Shinners var. grindelioides Native MAGRGrayless tansyaster · Asteraceae 25 counties
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Machaeranthera pinnatifida (Hook.) Shinners Native MAPIlacy tansyaster · Asteraceae 13 counties - Machaeranthera pinnatifida (Hook.) Shinners ssp. pinnatifida Native MAPIPlacy tansyaster · Asteraceae 13 counties
- Machaeranthera pinnatifida (Hook.) Shinners ssp. pinnatifida var. pinnatifida Native MAPIP4lacy tansyaster · Asteraceae 13 counties
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Machaeranthera tanacetifolia (Kunth) Nees Native MATA2tanseyleaf tansyaster · Asteraceae 14 counties -
Madia exigua (Sm.) A. Gray Native MAEXsmall tarweed · Asteraceae 4 counties -
Madia glomerata Hook. Native MAGL2mountain tarweed · Asteraceae 17 counties -
Madia gracilis (Sm.) D.D. Keck Native MAGR3grassy tarweed · Asteraceae 1 county -
Mahonia aquifolium (Pursh) Nutt. Native MAAQ2hollyleaved barberry · Berberidaceae 3 counties -
Mahonia repens (Lindl.) G. Don Native MARE11creeping barberry · Berberidaceae 31 counties -
Maianthemum canadense Desf. Native MACA4Canada mayflower · Liliaceae 1 county -
Maianthemum racemosum (L.) Link Native MARA7feathery false lily of the valley · Liliaceae 15 counties - Maianthemum racemosum (L.) Link ssp. amplexicaule (Nutt.) LaFrankie Native MARAAfeathery false lily of the valley · Liliaceae 15 counties
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Maianthemum stellatum (L.) Link Native MAST4starry false lily of the valley · Liliaceae 33 counties -
Malacothrix sonchoides (Nutt.) Torr. & A. Gray Native MASOsowthistle desertdandelion · Asteraceae 1 county -
Malcolmia africana (L.) W.T. Aiton Introduced MAAFAfrican mustard · Brassicaceae 6 counties -
Malus pumila Mill. Introduced MAPUparadise apple · Rosaceae 3 counties -
Malva moschata L. Introduced MAMO2musk mallow · Malvaceae 4 counties -
Malva neglecta Wallr. Introduced MANEcommon mallow · Malvaceae 6 counties -
Malva parviflora L. Introduced MAPA5cheeseweed mallow · Malvaceae 33 counties -
Malva pusilla Sm. Introduced MAPU5low mallow · Malvaceae 2 counties -
Malva sylvestris L. Introduced MASYhigh mallow · Malvaceae 7 counties -
Malva verticillata L. Introduced MAVEcluster mallow · Malvaceae 1 county -
Marrubium vulgare L. Introduced MAVUhorehound · Lamiaceae 15 counties -
Marsilea oligospora Goodding Native MAOL3Pacific waterclover · Marsileaceae 1 county -
Marsilea vestita Hook. & Grev. Native MAVE2hairy waterclover · Marsileaceae 3 counties -
Matricaria discoidea DC. Introduced MADI6disc mayweed · Asteraceae 36 counties -
Medicago lupulina L. Introduced MELUblack medick · Fabaceae 46 counties -
Medicago polymorpha L. Introduced MEPO3burclover · Fabaceae 6 counties -
Medicago sativa L. Introduced MESAalfalfa · Fabaceae 33 counties - Medicago sativa L. ssp. falcata (L.) Arcang. Introduced MESAFyellow alfalfa · Fabaceae 13 counties
- Medicago sativa L. ssp. sativa Introduced MESASalfalfa · Fabaceae 2 counties
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Melampyrum lineare Desr. Native MELI2narrowleaf cowwheat · Scrophulariaceae 7 counties - Melampyrum lineare Desr. var. lineare Native MELIL3narrowleaf cowwheat · Scrophulariaceae 7 counties
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Melica bulbosa Geyer ex Porter & J.M. Coult. Native MEBUoniongrass · Poaceae 2 counties -
Melica smithii (Porter ex A. Gray) Vasey Native MESMSmith's melicgrass · Poaceae 1 county -
Melica spectabilis Scribn. Native MESPpurple oniongrass · Poaceae 2 counties -
Melica subulata (Griseb.) Scribn. Native MESUAlaska oniongrass · Poaceae 1 county - Melica subulata (Griseb.) Scribn. var. pammelii (Scribn.) C.L. Hitchc. Native MESUPPammel's oniongrass · Poaceae 1 county
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Melilotus officinalis (L.) Lam. Introduced MEOFsweetclover · Fabaceae 48 counties -
Mentha arvensis L. Native MEAR4wild mint · Lamiaceae 43 counties -
Mentha spicata L. Introduced MESP3spearmint · Lamiaceae 5 counties - Mentha ×piperita L. (pro sp.) [aquatica × spicata] Native MEPIpeppermint · Lamiaceae 3 counties
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Mentzelia albicaulis (Hook.) Torr. & A. Gray Native MEAL6whitestem blazingstar · Loasaceae 8 counties -
Mentzelia decapetala (Pursh ex Sims) Urb. & Gilg ex Gilg Native MEDE2tenpetal blazingstar · Loasaceae 23 counties -
Mentzelia dispersa S. Watson Native MEDIbushy blazingstar · Loasaceae 14 counties - Mentzelia dispersa S. Watson var. dispersa Native MEDIDbushy blazingstar · Loasaceae 1 county
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Mentzelia laevicaulis (Hook.) Torr. & A. Gray Native MELA2smoothstem blazingstar · Loasaceae 17 counties - Mentzelia laevicaulis (Hook.) Torr. & A. Gray var. laevicaulis Native MELAL3smoothstem blazingstar · Loasaceae 17 counties
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Mentzelia nuda (Pursh) Torr. & A. Gray Native MENUbractless blazingstar · Loasaceae 11 counties - Mentzelia nuda (Pursh) Torr. & A. Gray var. stricta (Osterh.) Harrington Native MENUSbractless blazingstar · Loasaceae 10 counties
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Mentzelia pumila Nutt. ex Torr. & A. Gray Native MEPU3dwarf mentzelia · Loasaceae 1 county - Mentzelia pumila Nutt. ex Torr. & A. Gray var. pumila Native MEPUPdwarf mentzelia · Loasaceae 1 county
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Menyanthes trifoliata L. Native METR3buckbean · Menyanthaceae 6 counties -
Menziesia ferruginea Sm. Native MEFErusty menziesia · Ericaceae 12 counties -
Mertensia alpina (Torr.) G. Don Native MEAL7alpine bluebells · Boraginaceae 9 counties -
Mertensia ciliata (James ex Torr.) G. Don Native MECI3tall fringed bluebells · Boraginaceae 17 counties - Mertensia ciliata (James ex Torr.) G. Don var. ciliata Native MECIC2tall fringed bluebells · Boraginaceae 17 counties
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Mertensia lanceolata (Pursh) DC. Native MELA3prairie bluebells · Boraginaceae 14 counties - Mertensia lanceolata (Pursh) DC. var. lanceolata Native MELAL2prairie bluebells · Boraginaceae 12 counties
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Mertensia longiflora Greene Native MELO4small bluebells · Boraginaceae 2 counties -
Mertensia oblongifolia (Nutt.) G. Don Native MEOBoblongleaf bluebells · Boraginaceae 23 counties -
Mertensia paniculata (Aiton) G. Don Native MEPAtall bluebells · Boraginaceae 4 counties -
Microseris nutans (Hook.) Sch. Bip. Native MINUnodding microseris · Asteraceae 18 counties -
Microsteris gracilis (Hook.) Greene Native MIGRslender phlox · Polemoniaceae 16 counties - Microsteris gracilis (Hook.) Greene var. gracilis Native MIGRG4slender phlox · Polemoniaceae 15 counties
- Microsteris gracilis (Hook.) Greene var. humilior (Hook.) Cronquist Native MIGRHslender phlox · Polemoniaceae 2 counties
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Mimulus breweri (Greene) Coville Native MIBR5Brewer's monkeyflower · Scrophulariaceae 1 county -
Mimulus clivicola Greenm. Native MICL3North Idaho monkeyflower · Scrophulariaceae 1 county -
Mimulus floribundus Lindl. Native MIFL2manyflowered monkeyflower · Scrophulariaceae 8 counties -
Mimulus glabratus Kunth Native MIGLroundleaf monkeyflower · Scrophulariaceae 1 county - Mimulus glabratus Kunth var. jamesii (Torr. & A. Gray ex Benth.) A. Gray Native MIGLJJames' monkeyflower · Scrophulariaceae 1 county
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Mimulus guttatus DC. Native MIGUseep monkeyflower · Scrophulariaceae 23 counties -
Mimulus lewisii Pursh Native MILE2purple monkeyflower · Scrophulariaceae 14 counties -
Mimulus moschatus Douglas ex Lindl. Native MIMO3muskflower · Scrophulariaceae 11 counties - Mimulus moschatus Douglas ex Lindl. var. moschatus Native MIMOM2muskflower · Scrophulariaceae 11 counties
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Mimulus nanus Hook. & Arn. Native MINAdwarf purple monkeyflower · Scrophulariaceae 1 county - Mimulus nanus Hook. & Arn. var. nanus (A.L. Grant) D. M. Thomps. Native MINAN2dwarf purple monkeyflower · Scrophulariaceae 1 county
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Mimulus suksdorfii A. Gray Native MISU2Suksdorf's monkeyflower · Scrophulariaceae 3 counties -
Mimulus tilingii Regel Native MITITiling's monkeyflower · Scrophulariaceae 4 counties - Mimulus tilingii Regel var. tilingii Native MITITTiling's monkeyflower · Scrophulariaceae 4 counties
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Minuartia austromontana S.J. Wolf & Packer Native MIAU3Columbian stitchwort · Caryophyllaceae 2 counties -
Minuartia nuttallii (Pax) Briq. Native MINU4Nuttall's sandwort · Caryophyllaceae 6 counties - Minuartia nuttallii (Pax) Briq. ssp. nuttallii Native MINUN2Nuttall's sandwort · Caryophyllaceae 6 counties
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Minuartia obtusiloba (Rydb.) House Native MIOB2twinflower sandwort · Caryophyllaceae 13 counties -
Minuartia rubella (Wahlenb.) Hiern. Native MIRU3beautiful sandwort · Caryophyllaceae 9 counties -
Mirabilis hirsuta (Pursh) MacMill. Native MIHIhairy four o'clock · Nyctaginaceae 1 county -
Mirabilis linearis (Pursh) Heimerl Native MILI3narrowleaf four o'clock · Nyctaginaceae 16 counties -
Mirabilis nyctaginea (Michx.) MacMill. Native MINYheartleaf four o'clock · Nyctaginaceae 8 counties -
Mitella breweri A. Gray Native MIBR6Brewer's miterwort · Saxifragaceae 2 counties -
Mitella nuda L. Native MINU3naked miterwort · Saxifragaceae 3 counties -
Mitella pentandra Hook. Native MIPEfivestamen miterwort · Saxifragaceae 12 counties -
Mitella stauropetala Piper Native MIST3smallflower miterwort · Saxifragaceae 4 counties - Mitella stauropetala Piper var. stauropetala Native MISTS2smallflower miterwort · Saxifragaceae 2 counties
- Mitella stauropetala Piper var. stenopetala (Piper) Rosend. Native MISTSdrywoods miterwort · Saxifragaceae 2 counties
- Mitella trifida Graham Native MITR4threeparted miterwort · Saxifragaceae 2 counties
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Moehringia lateriflora (L.) Fenzl Native MOLA6bluntleaf sandwort · Caryophyllaceae 13 counties -
Moehringia macrophylla (Hook.) Fenzl Native MOMA3largeleaf sandwort · Caryophyllaceae 1 county -
Mollugo verticillata L. Native MOVEgreen carpetweed · Molluginaceae 2 counties -
Monarda fistulosa L. Native MOFIwild bergamot · Lamiaceae 42 counties - Monarda fistulosa L. ssp. fistulosa Native MOFIFwild bergamot · Lamiaceae 42 counties
- Monarda fistulosa L. ssp. fistulosa var. menthifolia (Graham) Fernald Native MOFIM2mintleaf bergamot · Lamiaceae 42 counties
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Moneses uniflora (L.) A. Gray Native MOUN2single delight · Pyrolaceae 12 counties -
Monolepis nuttalliana (Schult.) Greene Native MONUNuttall's povertyweed · Chenopodiaceae 37 counties -
Monotropa hypopitys L. Native MOHY3pinesap · Monotropaceae 6 counties -
Monotropa uniflora L. Native MOUN3Indianpipe · Monotropaceae 3 counties -
Montia chamissoi (Ledeb. ex Spreng.) Greene Native MOCHwater minerslettuce · Portulacaceae 4 counties -
Montia linearis (Douglas ex Hook.) Greene Native MOLI4narrowleaf minerslettuce · Portulacaceae 6 counties -
Montia parvifolia (Moc. ex DC.) Greene Native MOPA2littleleaf minerslettuce · Portulacaceae 5 counties - Montia parvifolia (Moc. ex DC.) Greene ssp. parvifolia Native MOPAPlittleleaf minerslettuce · Portulacaceae 5 counties
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Morus alba L. Introduced MOALwhite mulberry · Moraceae 4 counties -
Muhlenbergia andina (Nutt.) Hitchc. Native MUANfoxtail muhly · Poaceae 2 counties -
Muhlenbergia asperifolia (Nees & Meyen ex Trin.) Parodi Native MUASscratchgrass · Poaceae 7 counties -
Muhlenbergia cuspidata (Torr. ex Hook.) Rydb. Native MUCU3plains muhly · Poaceae 3 counties -
Muhlenbergia filiformis (Thurb. ex S. Watson) Rydb. Native MUFI2pullup muhly · Poaceae 2 counties -
Muhlenbergia glomerata (Willd.) Trin. Native MUGL3spiked muhly · Poaceae 1 county -
Muhlenbergia racemosa (Michx.) Britton, Sterns & Poggenb. Native MURAmarsh muhly · Poaceae 4 counties -
Muhlenbergia richardsonis (Trin.) Rydb. Native MURImat muhly · Poaceae 5 counties -
Munroa squarrosa (Nutt.) Torr. Native MUSQ3false buffalograss · Poaceae 6 counties -
Musineon divaricatum (Pursh) Raf. Native MUDIleafy wildparsley · Apiaceae 43 counties - Musineon divaricatum (Pursh) Raf. var. hookeri (Torr. & A. Gray) Mathias Native MUDIHHooker's wildparsley · Apiaceae 1 county
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Musineon vaginatum Rydb. Native MUVAsheathed wildparsley · Apiaceae 1 county -
Mycelis muralis (L.) Dumort. Introduced MYMUwall-lettuce · Asteraceae 1 county -
Myosotis arvensis (L.) Hill Introduced MYARfield forget-me-not · Boraginaceae 9 counties -
Myosotis asiatica (Vesterg.) Schischkin & Sergievskaja Native MYAS2Asian forget-me-not · Boraginaceae 15 counties -
Myosotis discolor Pers. Introduced MYDIchanging forget-me-not · Boraginaceae 4 counties -
Myosotis laxa Lehm. Native MYLAbay forget-me-not · Boraginaceae 1 county -
Myosotis scorpioides L. Introduced MYSCtrue forget-me-not · Boraginaceae 12 counties -
Myosotis stricta Link ex Roem. & Schult. Introduced MYST2strict forget-me-not · Boraginaceae 11 counties -
Myosurus apetalus C. Gay Native MYAPbristly mousetail · Ranunculaceae 4 counties - Myosurus apetalus C. Gay var. borealis Whittemore Native MYAPBbristly mousetail · Ranunculaceae 4 counties
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Myosurus minimus L. Native MYMI2tiny mousetail · Ranunculaceae 4 counties -
Myriophyllum sibiricum Kom. Native MYSIshortspike watermilfoil · Haloragaceae 14 counties -
Myriophyllum verticillatum L. Native MYVE3whorl-leaf watermilfoil · Haloragaceae 1 county -
Najas flexilis (Willd.) Rostk. & Schmidt Native NAFLnodding waternymph · Najadaceae 3 counties - Najas guadalupensis (Spreng.) Magnus Native NAGUsouthern waternymph · Najadaceae 1 county
- Najas guadalupensis (Spreng.) Magnus ssp. guadalupensis Native NAGUGsouthern waternymph · Najadaceae 1 county
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Nassella viridula (Trin.) Barkworth Native NAVI4green needlegrass · Poaceae 18 counties -
Nasturtium officinale W.T. Aiton Introduced NAOFwatercress · Brassicaceae 28 counties -
Navarretia breweri (A. Gray) Greene Native NABRBrewer's navarretia · Polemoniaceae 1 county -
Navarretia intertexta (Benth.) Hook. Native NAIN2needleleaf navarretia · Polemoniaceae 4 counties - Navarretia intertexta (Benth.) Hook. ssp. propinqua (Suksd.) Day Native NAINP3near navarretia · Polemoniaceae 4 counties
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Navarretia saximontana S.C. Spencer Native NASA3Rocky Mountain Pincushion-Plant · Polemoniaceae 5 counties -
Nemophila breviflora A. Gray Native NEBRbasin nemophila · Hydrophyllaceae 6 counties -
Nepeta cataria L. Introduced NECA2catnip · Lamiaceae 29 counties -
Nicotiana attenuata Torr. ex S. Watson Native NIATcoyote tobacco · Solanaceae 1 county -
Nigella damascena L. Introduced NIDAdevil in the bush · Ranunculaceae 2 counties -
Noccaea fendleri (A. Gray) Holub Native NOFE3Fendler's pennycress · Brassicaceae 9 counties - Noccaea fendleri (A. Gray) Holub ssp. glauca (A. Nelson) Al-Shehbaz & M. Koch Native NOFEGalpine pennycress · Brassicaceae 9 counties
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Noccaea parviflora (A. Nelson) Holub Native NOPA5meadow pennycress · Brassicaceae 2 counties -
Nothocalais cuspidata (Pursh) Greene Native NOCUprairie false dandelion · Asteraceae 24 counties -
Nothocalais nigrescens (L.F. Hend.) A. Heller Native NONIspeckled false dandelion · Asteraceae 3 counties -
Nuphar lutea (L.) Sm. Native NULUyellow pond-lily · Nymphaeaceae 11 counties - Nuphar lutea (L.) Sm. ssp. polysepala (Engelm.) E.O. Beal Native NULUPRocky Mountain pond-lily · Nymphaeaceae 11 counties
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Oenothera albicaulis Pursh Native OEALwhitest evening primrose · Onagraceae 19 counties -
Oenothera biennis L. Native OEBIcommon evening primrose · Onagraceae 17 counties -
Oenothera caespitosa Nutt. Native OECA10tufted evening primrose · Onagraceae 34 counties - Oenothera caespitosa Nutt. ssp. caespitosa Native OECAC2tufted evening primrose · Onagraceae 34 counties
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Oenothera curtiflora W.L. Wagner & Hoch Native OECU2velvetweed · Onagraceae 21 counties -
Oenothera flava (A. Nelson) Garrett Native OEFLyellow evening primrose · Onagraceae 6 counties - Oenothera flava (A. Nelson) Garrett ssp. flava Native OEFLFyellow evening primrose · Onagraceae 5 counties
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Oenothera nuttallii Sweet Native OENUNuttall's evening primrose · Onagraceae 17 counties - Oenothera pallida Lindl. Native OEPApale evening primrose · Onagraceae 2 counties
- Oenothera pallida Lindl. ssp. trichocalyx (Nutt.) Munz & W. Klein Native OEPATpale evening primrose · Onagraceae 2 counties
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Oenothera suffrutescens (Ser.) W.L. Wagner & Hoch Native OESU3scarlet beeblossom · Onagraceae 54 counties -
Oenothera villosa Thunb. Native OEVIhairy evening primrose · Onagraceae 13 counties - Oenothera villosa Thunb. ssp. strigosa (Rydb.) W. Dietr. & P.H. Raven Native OEVIShairy evening primrose · Onagraceae 3 counties
- Oenothera villosa Thunb. ssp. villosa Native OEVIVhairy evening primrose · Onagraceae 9 counties
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Oligoneuron album (Nutt.) G.L. Nesom Native OLAL2prairie goldenrod · Asteraceae 2 counties -
Oligoneuron rigidum (L.) Small Native OLRIstiff goldenrod · Asteraceae 43 counties - Oligoneuron rigidum (L.) Small var. humile (Porter) G.L. Nesom Native OLRIHstiff goldenrod · Asteraceae 43 counties
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Onobrychis viciifolia Scop. Introduced ONVIsainfoin · Fabaceae 11 counties -
Onopordum acanthium L. Introduced ONACScotch cottonthistle · Asteraceae 7 counties -
Onosmodium bejariense DC. ex A. DC. Native ONBEsoft-hair marbleseed · Boraginaceae 6 counties - Onosmodium bejariense DC. ex A. DC. var. occidentale (Mack.) B.L. Turner Native ONBEOwestern marbleseed · Boraginaceae 6 counties
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Oonopsis multicaulis (Nutt.) Greene Native OOMUbranched false goldenweed · Asteraceae 1 county -
Oplopanax horridus (Sm.) Miq. Native OPHOdevilsclub · Araliaceae 6 counties -
Opuntia fragilis (Nutt.) Haw. Native OPFRbrittle pricklypear · Cactaceae 7 counties -
Opuntia polyacantha Haw. Native OPPOplains pricklypear · Cactaceae 26 counties - Opuntia polyacantha Haw. var. polyacantha Native OPPOPhairspine pricklypear · Cactaceae 26 counties
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Oreostemma alpigenum (Torr. & A. Gray) Greene Native ORAL4tundra aster · Asteraceae 8 counties - Oreostemma alpigenum (Torr. & A. Gray) Greene var. haydenii (Porter) G.L. Nesom Native ORALHtundra aster · Asteraceae 8 counties
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Orobanche corymbosa (Rydb.) Ferris Native ORCO5flat-top broomrape · Orobanchaceae 1 county - Orobanche corymbosa (Rydb.) Ferris ssp. corymbosa Native ORCOC3flat-top broomrape · Orobanchaceae 1 county
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Orobanche fasciculata Nutt. Native ORFAclustered broomrape · Orobanchaceae 23 counties -
Orobanche ludoviciana Nutt. Native ORLULouisiana broomrape · Orobanchaceae 12 counties - Orobanche ludoviciana Nutt. ssp. ludoviciana Native ORLUL2Louisiana broomrape · Orobanchaceae 12 counties
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Orobanche uniflora L. Native ORUNoneflowered broomrape · Orobanchaceae 7 counties -
Orogenia linearifolia S. Watson Native ORLIGreat Basin Indian potato · Apiaceae 1 county -
Orthilia secunda (L.) House Native ORSEsidebells wintergreen · Pyrolaceae 15 counties -
Orthocarpus luteus Nutt. Native ORLU2yellow owl's-clover · Scrophulariaceae 24 counties -
Orthocarpus tenuifolius (Pursh) Benth. Native ORTE2thinleaved owl's-clover · Scrophulariaceae 14 counties -
Orthocarpus tolmiei Hook. & Arn. Native ORTOTolmie's owl's-clover · Scrophulariaceae 1 county - Orthocarpus tolmiei Hook. & Arn. ssp. tolmiei Native ORTOTTolmie's owl's-clover · Scrophulariaceae 1 county
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Oryzopsis asperifolia Michx. Native ORASroughleaf ricegrass · Poaceae 2 counties -
Osmorhiza berteroi DC. Native OSBEsweetcicely · Apiaceae 9 counties -
Osmorhiza depauperata Phil. Native OSDEbluntseed sweetroot · Apiaceae 9 counties -
Osmorhiza longistylis (Torr.) DC. Native OSLOlongstyle sweetroot · Apiaceae 8 counties -
Osmorhiza occidentalis (Nutt. ex Torr. & A. Gray) Torr. Native OSOCwestern sweetroot · Apiaceae 14 counties -
Osmorhiza purpurea (J.M. Coult. & Rose) Suksd. Native OSPUpurple sweetroot · Apiaceae 1 county -
Oxalis corniculata L. Native OXCOcreeping woodsorrel · Oxalidaceae 7 counties -
Oxalis dillenii Jacq. Native OXDI2slender yellow woodsorrel · Oxalidaceae 1 county -
Oxalis stricta L. Native OXSTcommon yellow oxalis · Oxalidaceae 4 counties -
Oxyria digyna (L.) Hill Native OXDI3alpine mountainsorrel · Polygonaceae 7 counties -
Oxytropis besseyi (Rydb.) Blank. Native OXBE2Bessey's locoweed · Fabaceae 33 counties - Oxytropis besseyi (Rydb.) Blank. var. argophylla (Rydb.) Barneby Native OXBEAMontana locoweed · Fabaceae 1 county
- Oxytropis besseyi (Rydb.) Blank. var. besseyi Native OXBEBBessey's locoweed · Fabaceae 3 counties
- Oxytropis besseyi (Rydb.) Blank. var. ventosa (Greene) Barneby Native OXBEVBessey's locoweed · Fabaceae 1 county
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Oxytropis borealis DC. Native OXBOboreal locoweed · Fabaceae 17 counties - Oxytropis borealis DC. var. viscida (Nutt.) S.L. Welsh Native OXBOVviscid locoweed · Fabaceae 17 counties
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Oxytropis campestris (L.) DC. Native OXCA4field locoweed · Fabaceae 36 counties - Oxytropis campestris (L.) DC. var. cusickii (Greenm.) Barneby Native OXCAC3Cusick's locoweed · Fabaceae 2 counties
- Oxytropis campestris (L.) DC. var. spicata Hook. Native OXCAS3field locoweed · Fabaceae 4 counties
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Oxytropis deflexa (Pall.) DC. Native OXDE2nodding locoweed · Fabaceae 12 counties - Oxytropis deflexa (Pall.) DC. var. foliolosa (Hook.) Barneby Native OXDEFnodding locoweed · Fabaceae 1 county
- Oxytropis deflexa (Pall.) DC. var. sericea Torr. & A. Gray Native OXDESblue nodding locoweed · Fabaceae 2 counties
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Oxytropis lagopus Nutt. Native OXLA2haresfoot locoweed · Fabaceae 25 counties - Oxytropis lagopus Nutt. var. atropurpurea (Rydb.) Barneby Native OXLAAharesfoot locoweed · Fabaceae 2 counties
- Oxytropis lagopus Nutt. var. lagopus Native OXLALharesfoot locoweed · Fabaceae 2 counties
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Oxytropis lambertii Pursh Native OXLA3purple locoweed · Fabaceae 23 counties - Oxytropis lambertii Pursh var. lambertii Native OXLAL2purple locoweed · Fabaceae 23 counties
- Oxytropis monticola A. Gray Native OXMO2yellowflower locoweed · Fabaceae 6 counties
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Oxytropis parryi A. Gray Native OXPA2Parry's oxytrope · Fabaceae 2 counties -
Oxytropis podocarpa A. Gray Native OXPOstalkpod locoweed · Fabaceae 3 counties - Oxytropis riparia Litv. Introduced OXRI80Oxus locoweed · Fabaceae 4 counties
- Oxytropis sericea Nutt. Native OXSEwhite locoweed · Fabaceae 45 counties
- Oxytropis sericea Nutt. var. sericea Native OXSESwhite locoweed · Fabaceae 2 counties
- Oxytropis sericea Nutt. var. speciosa (Torr. & A. Gray) S.L. Welsh Native OXSES2white locoweed · Fabaceae 2 counties
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Oxytropis splendens Douglas ex Hook. Native OXSPshowy locoweed · Fabaceae 19 counties -
Packera cana (Hook.) W.A. Weber & Á. Löve Native PACA15woolly groundsel · Asteraceae 52 counties -
Packera debilis (Nutt.) W.A. Weber & Á. Löve Native PADE22weak groundsel · Asteraceae 1 county -
Packera dimorphophylla (Greene) W.A. Weber & Á. Löve Native PADI11splitleaf groundsel · Asteraceae 2 counties - Packera dimorphophylla (Greene) W.A. Weber & Á. Löve var. paysonii (T.M. Barkley) D.K. Trock & T.M. Barkley Native PADIP2Payson's groundsel · Asteraceae 2 counties
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Packera indecora (Greene) Á. Löve & D. Löve Native PAIN11elegant groundsel · Asteraceae 5 counties -
Packera pauciflora (Pursh) Á. Löve & D. Löve Native PAPA19alpine groundsel · Asteraceae 4 counties -
Packera paupercula (Michx.) Á. Löve & D. Löve Native PAPA20balsam groundsel · Asteraceae 7 counties -
Packera plattensis (Nutt.) W.A. Weber & Á. Löve Native PAPL12prairie groundsel · Asteraceae 6 counties -
Packera pseudaurea (Rydb.) W.A. Weber & Á. Löve Native PAPS5falsegold groundsel · Asteraceae 10 counties - Packera pseudaurea (Rydb.) W.A. Weber & Á. Löve var. pseudaurea Native PAPSP2falsegold groundsel · Asteraceae 10 counties
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Packera streptanthifolia (Greene) W.A. Weber & Á. Löve Native PAST10Rocky Mountain groundsel · Asteraceae 7 counties -
Packera subnuda (DC.) D.K. Trock & T.M. Barkley Native PASU40Buek's groundsel · Asteraceae 6 counties -
Packera tridenticulata (Rydb.) W.A. Weber & Á. Löve Native PATR7threetooth ragwort · Asteraceae 1 county -
Packera werneriifolia (A. Gray) W.A. Weber & Á. Löve Native PAWE4hoary groundsel · Asteraceae 6 counties -
Paeonia brownii Douglas ex Hook. Native PABRBrown's peony · Paeoniaceae 1 county -
Panicum capillare L. Native PACA6witchgrass · Poaceae 8 counties -
Panicum miliaceum L. Introduced PAMI2proso millet · Poaceae 15 counties - Panicum miliaceum L. ssp. miliaceum Introduced PAMIMbroomcorn millet · Poaceae 15 counties
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Panicum virgatum L. Native PAVI2switchgrass · Poaceae 6 counties - Panicum virgatum L. var. virgatum Native PAVIVswitchgrass · Poaceae 6 counties
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Papaver argemone L. Introduced PAAR3long pricklyhead poppy · Papaveraceae 1 county -
Papaver pygmaeum Rydb. Native PAPYalpine poppy · Papaveraceae 1 county -
Papaver radicatum Rottb. Native PARA11rooted poppy · Papaveraceae 2 counties - Papaver radicatum Rottb. ssp. kluanense (D. Löve) D.F. Murray Native PARAKrooted poppy · Papaveraceae 2 counties
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Papaver rhoeas L. Introduced PARH2corn poppy · Papaveraceae 2 counties -
Parietaria pensylvanica Muhl. ex Willd. Native PAPE5Pennsylvania pellitory · Urticaceae 13 counties -
Parnassia fimbriata K.D. Koenig Native PAFI3fringed grass of Parnassus · Saxifragaceae 16 counties - Parnassia fimbriata K.D. Koenig var. fimbriata Native PAFIFfringed grass of Parnassus · Saxifragaceae 16 counties
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Parnassia kotzebuei Cham. ex Spreng. Native PAKO3Kotzebue's grass of Parnassus · Saxifragaceae 4 counties -
Parnassia palustris L. Native PAPA8marsh grass of Parnassus · Saxifragaceae 9 counties - Parnassia palustris L. var. montanensis (Fernald & Rydb. ex Rydb.) C.L. Hitchc. Native PAPAM2mountain grass of Parnassus · Saxifragaceae 2 counties
- Parnassia palustris L. var. parviflora (DC.) B. Boivin Native PAPAP2smallflower grass of Parnassus · Saxifragaceae 6 counties
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Paronychia sessiliflora Nutt. Native PASEcreeping nailwort · Caryophyllaceae 22 counties -
Parrya nudicaulis (L.) Regel Native PANU5nakedstem wallflower · Brassicaceae 1 county -
Parthenocissus vitacea (Knerr) Hitchc. Native PAVI5woodbine · Vitaceae 4 counties -
Pascopyrum smithii (Rydb.) Á. Löve Native PASMwestern wheatgrass · Poaceae 18 counties -
Pastinaca sativa L. Introduced PASA2wild parsnip · Apiaceae 18 counties -
Paxistima myrsinites (Pursh) Raf. Native PAMYOregon boxleaf · Celastraceae 10 counties -
Pedicularis bracteosa Benth. Native PEBRbracted lousewort · Scrophulariaceae 15 counties - Pedicularis bracteosa Benth. var. canbyi (A. Gray) Cronquist Native PEBRCCanby's lousewort · Scrophulariaceae 2 counties
- Pedicularis bracteosa Benth. var. paysoniana (Pennell) Cronquist Native PEBRP2Payson's lousewort · Scrophulariaceae 11 counties
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Pedicularis contorta Benth. Native PECOcoiled lousewort · Scrophulariaceae 16 counties - Pedicularis contorta Benth. var. contorta Native PECOC2coiled lousewort · Scrophulariaceae 1 county
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Pedicularis cystopteridifolia Rydb. Native PECY5fernleaved pedicularis · Scrophulariaceae 6 counties -
Pedicularis groenlandica Retz. Native PEGR2elephanthead lousewort · Scrophulariaceae 15 counties -
Pedicularis oederi Vahl ex Hornem. Native PEOEOeder's lousewort · Scrophulariaceae 3 counties -
Pedicularis parryi A. Gray Native PEPA3Parry's lousewort · Scrophulariaceae 9 counties - Pedicularis parryi A. Gray ssp. parryi Native PEPAP4Parry's lousewort · Scrophulariaceae 2 counties
- Pedicularis parryi A. Gray ssp. purpurea (Parry) G.D. Carr Native PEPAP5Rocky Mountain lousewort · Scrophulariaceae 9 counties
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Pedicularis procera A. Gray Native PEPR7giant lousewort · Scrophulariaceae 1 county -
Pedicularis pulchella Pennell Native PEPU10mountain lousewort · Scrophulariaceae 5 counties -
Pedicularis racemosa Douglas ex Benth. Native PERAsickletop lousewort · Scrophulariaceae 14 counties - Pedicularis racemosa Douglas ex Benth. ssp. alba Pennell Native PERAAsickletop lousewort · Scrophulariaceae 14 counties
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Pediomelum argophyllum (Pursh) J. Grimes Native PEAR6silverleaf Indian breadroot · Fabaceae 28 counties -
Pediomelum esculentum (Pursh) Rydb. Native PEESlarge Indian breadroot · Fabaceae 35 counties -
Peganum harmala L. Introduced PEHAharmal peganum · Zygophyllaceae 2 counties -
Pellaea breweri D.C. Eaton Native PEBR4Brewer's cliffbrake · Pteridaceae 2 counties -
Pellaea glabella Mett. ex Kuhn Native PEGLsmooth cliffbrake · Pteridaceae 4 counties - Pellaea glabella Mett. ex Kuhn ssp. occidentalis (E.E. Nelson) Windham Native PEGLO3western dwarf cliffbrake · Pteridaceae 4 counties
- Pellaea glabella Mett. ex Kuhn ssp. simplex (Butters) Á. Löve & D. Löve Native PEGLS3smooth cliffbrake · Pteridaceae 1 county
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Penstemon absarokensis Evert Native PEAB2Absaroka Range beardtongue · Scrophulariaceae 1 county -
Penstemon albertinus Greene Native PEAL11Alberta beardtongue · Scrophulariaceae 11 counties -
Penstemon albidus Nutt. Native PEAL2white penstemon · Scrophulariaceae 38 counties -
Penstemon angustifolius Nutt. ex Pursh Native PEAN4broadbeard beardtongue · Scrophulariaceae 3 counties - Penstemon angustifolius Nutt. ex Pursh var. angustifolius Native PEANA2broadbeard beardtongue · Scrophulariaceae 3 counties
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Penstemon arenicola A. Nelson Native PEARsand penstemon · Scrophulariaceae 1 county -
Penstemon aridus Rydb. Native PEAR2stiffleaf penstemon · Scrophulariaceae 9 counties -
Penstemon attenuatus Douglas ex Lindl. Native PEAT3sulphur penstemon · Scrophulariaceae 13 counties - Penstemon attenuatus Douglas ex Lindl. var. pseudoprocerus (Rydb.) Cronquist Native PEATP5small penstemon · Scrophulariaceae 2 counties
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Penstemon confertus Douglas ex Lindl. Native PECO6yellow penstemon · Scrophulariaceae 12 counties -
Penstemon cyananthus Hook. Native PECY2Wasatch beardtongue · Scrophulariaceae 1 county - Penstemon cyananthus Hook. var. cyananthus Native PECYC2Wasatch beardtongue · Scrophulariaceae 1 county
- Penstemon cyananthus Hook. var. subglaber (A. Gray) N.H. Holmgren Native PECYS2Wasatch beardtongue · Scrophulariaceae 1 county
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Penstemon cyaneus Pennell Native PECY3blue penstemon · Scrophulariaceae 3 counties -
Penstemon deustus Douglas ex Lindl. Native PEDE4scabland penstemon · Scrophulariaceae 3 counties -
Penstemon deustus Douglas ex Lindl. var. deustus Native PEDED2scabland penstemon · Scrophulariaceae 3 counties -
Penstemon diphyllus Rydb. Native PEDI5twoleaf beardtongue · Scrophulariaceae 7 counties -
Penstemon ellipticus J.M. Coult. & Fisher Native PEEL5rocky ledge penstemon · Scrophulariaceae 5 counties -
Penstemon eriantherus Pursh Native PEERfuzzytongue penstemon · Scrophulariaceae 35 counties - Penstemon eriantherus Pursh var. eriantherus Native PEEREfuzzytongue penstemon · Scrophulariaceae 3 counties
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Penstemon flavescens Pennell Native PEFL6high mountain penstemon · Scrophulariaceae 4 counties -
Penstemon fruticosus (Pursh) Greene Native PEFR3bush penstemon · Scrophulariaceae 13 counties - Penstemon fruticosus (Pursh) Greene var. fruticosus Native PEFRF4bush penstemon · Scrophulariaceae 13 counties
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Penstemon glaber Pursh Native PEGL3sawsepal penstemon · Scrophulariaceae 5 counties - Penstemon glaber Pursh var. glaber Native PEGLG2sawsepal penstemon · Scrophulariaceae 5 counties
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Penstemon gracilis Nutt. Native PEGR5lilac penstemon · Scrophulariaceae 13 counties - Penstemon gracilis Nutt. var. gracilis Native PEGRG3lilac penstemon · Scrophulariaceae 11 counties
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Penstemon grandiflorus Nutt. Native PEGR7large beardtongue · Scrophulariaceae 1 county -
Penstemon humilis Nutt. ex A. Gray Native PEHUlow beardtongue · Scrophulariaceae 1 county - Penstemon humilis Nutt. ex A. Gray ssp. humilis Native PEHUHlow beardtongue · Scrophulariaceae 1 county
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Penstemon laricifolius Hook. & Arn. Native PELA9larchleaf beardtongue · Scrophulariaceae 3 counties - Penstemon laricifolius Hook. & Arn. ssp. laricifolius Native PELAL7larchleaf beardtongue · Scrophulariaceae 3 counties
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Penstemon lemhiensis (D.D. Keck) D.D. Keck & Cronquist Native PELE8Lemhi penstemon · Scrophulariaceae 1 county -
Penstemon lyallii (A. Gray) A. Gray Native PELY2Lyall's beardtongue · Scrophulariaceae 6 counties -
Penstemon montanus Greene Native PEMO4cordroot beardtongue · Scrophulariaceae 6 counties - Penstemon montanus Greene var. montanus Native PEMOM2cordroot beardtongue · Scrophulariaceae 6 counties
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Penstemon nitidus Douglas ex Benth. Native PENI3waxleaf penstemon · Scrophulariaceae 45 counties - Penstemon nitidus Douglas ex Benth. var. nitidus Native PENINwaxleaf penstemon · Scrophulariaceae 3 counties
- Penstemon procerus Douglas ex Graham Native PEPR2littleflower penstemon · Scrophulariaceae 28 counties
- Penstemon procerus Douglas ex Graham var. procerus Native PEPRPpincushion beardtongue · Scrophulariaceae 28 counties
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Penstemon radicosus A. Nelson Native PERA2matroot penstemon · Scrophulariaceae 5 counties -
Penstemon rydbergii A. Nelson Native PERYRydberg's penstemon · Scrophulariaceae 4 counties -
Penstemon subglaber Rydb. Native PESU2smooth penstemon · Scrophulariaceae 1 county -
Penstemon whippleanus A. Gray Native PEWHWhipple's penstemon · Scrophulariaceae 2 counties -
Penstemon wilcoxii Rydb. Native PEWIWilcox's penstemon · Scrophulariaceae 13 counties -
Perideridia bolanderi (A. Gray) A. Nelson & J.F. Macbr. Native PEBO2Bolander's yampah · Apiaceae 1 county - Perideridia bolanderi (A. Gray) A. Nelson & J.F. Macbr. ssp. bolanderi Native PEBOBBolander's yampah · Apiaceae 1 county
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Perideridia gairdneri (Hook. & Arn.) Mathias Native PEGA3Gardner's yampah · Apiaceae 23 counties - Perideridia gairdneri (Hook. & Arn.) Mathias ssp. borealis T.I. Chuang & Constance Native PEGABcommon yampah · Apiaceae 23 counties
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Petasites frigidus (L.) Fr. Native PEFR5arctic sweet coltsfoot · Asteraceae 5 counties - Petasites frigidus (L.) Fr. var. sagittatus (Banks ex Pursh) Cherniawsky Native PEFRS5arrowleaf sweet coltsfoot · Asteraceae 5 counties
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Petrophytum caespitosum (Nutt.) Rydb. Native PECA12mat rockspirea · Rosaceae 4 counties - Petrophytum caespitosum (Nutt.) Rydb. var. caespitosum Native PECAC2mat rockspirea · Rosaceae 4 counties
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Phacelia franklinii (R. Br.) A. Gray Native PHFRFranklin's phacelia · Hydrophyllaceae 3 counties -
Phacelia hastata Douglas ex Lehm. Native PHHAsilverleaf phacelia · Hydrophyllaceae 30 counties - Phacelia hastata Douglas ex Lehm. var. hastata Native PHHAHsilverleaf phacelia · Hydrophyllaceae 30 counties
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Phacelia heterophylla Pursh Native PHHE2varileaf phacelia · Hydrophyllaceae 11 counties - Phacelia heterophylla Pursh ssp. heterophylla Native PHHEHvarileaf phacelia · Hydrophyllaceae 10 counties
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Phacelia linearis (Pursh) Holz. Native PHLIthreadleaf phacelia · Hydrophyllaceae 33 counties -
Phacelia lyallii (A. Gray) Rydb. Native PHLY2alpine phacelia · Hydrophyllaceae 4 counties -
Phacelia sericea (Graham) A. Gray Native PHSEsilky phacelia · Hydrophyllaceae 12 counties - Phacelia sericea (Graham) A. Gray ssp. ciliosa (Rydb.) G.W. Gillett Native PHSECsilky phacelia · Hydrophyllaceae 2 counties
- Phacelia sericea (Graham) A. Gray ssp. sericea Native PHSESsilky phacelia · Hydrophyllaceae 12 counties
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Phacelia thermalis Greene Native PHTHheated phacelia · Hydrophyllaceae 1 county -
Phalaris aquatica L. Introduced PHAQbulbous canarygrass · Poaceae 1 county -
Phalaris arundinacea L. Native PHAR3reed canarygrass · Poaceae 31 counties -
Phalaris canariensis L. Introduced PHCA5annual canarygrass · Poaceae 6 counties -
Phippsia algida (Sol.) R. Br. Native PHALicegrass · Poaceae 1 county -
Phleum alpinum L. Native PHAL2alpine timothy · Poaceae 3 counties -
Phleum pratense L. Introduced PHPR3timothy · Poaceae 41 counties -
Phlox albomarginata M.E. Jones Native PHAL8whitemargin phlox · Polemoniaceae 3 counties -
Phlox alyssifolia Greene Native PHAL3alyssumleaf phlox · Polemoniaceae 28 counties -
Phlox andicola E.E. Nelson Native PHAN4prairie phlox · Polemoniaceae 5 counties - Phlox andicola E.E. Nelson ssp. parvula Wherry Native PHANP2prairie phlox · Polemoniaceae 3 counties
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Phlox caespitosa Nutt. Native PHCA7tufted phlox · Polemoniaceae 12 counties -
Phlox diffusa Benth. Native PHDI3spreading phlox · Polemoniaceae 4 counties -
Phlox hoodii Richardson Native PHHOspiny phlox · Polemoniaceae 41 counties - Phlox hoodii Richardson ssp. muscoides (Nutt.) Wherry Native PHHOMmusk phlox · Polemoniaceae 17 counties
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Phlox kelseyi Britton Native PHKEKelsey's phlox · Polemoniaceae 7 counties - Phlox kelseyi Britton ssp. kelseyi Native PHKEKKelsey's phlox · Polemoniaceae 7 counties
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Phlox longifolia Nutt. Native PHLO2longleaf phlox · Polemoniaceae 14 counties - Phlox longifolia Nutt. ssp. longifolia Native PHLOL2longleaf phlox · Polemoniaceae 14 counties
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Phlox multiflora A. Nelson Native PHMU3flowery phlox · Polemoniaceae 13 counties - Phlox multiflora A. Nelson ssp. depressa (E.E. Nelson) Wherry Native PHMUDRocky Mountain phlox · Polemoniaceae 1 county
- Phlox multiflora A. Nelson ssp. multiflora Native PHMUMflowery phlox · Polemoniaceae 2 counties
- Phlox pulvinata (Wherry) Cronquist Native PHPU5cushion phlox · Polemoniaceae 12 counties
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Phlox speciosa Pursh Native PHSPshowy phlox · Polemoniaceae 1 county - Phlox speciosa Pursh ssp. occidentalis (Durand ex Torr.) Wherry Native PHSPOshowy phlox · Polemoniaceae 1 county
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Phragmites australis (Cav.) Trin. ex Steud. Both PHAU7common reed · Poaceae 5 counties - Phragmites australis (Cav.) Trin. ex Steud. ssp. americanus Saltonst., P.M. Peterson & Soreng Native PHAUA6American common reed · Poaceae 1 county
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Phyllodoce empetriformis (Sm.) D. Don Native PHEMpink mountainheath · Ericaceae 13 counties -
Phyllodoce glanduliflora (Hook.) Coville Native PHGL6yellow mountainheath · Ericaceae 10 counties - Phyllodoce ×intermedia (Hook.) Rydb. (pro sp.) [empetriformis × glanduliflora] Native PHIN7mountainheath · Ericaceae 2 counties
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Physalis hederifolia A. Gray Native PHHE4ivyleaf groundcherry · Solanaceae 1 county - Physalis hederifolia A. Gray var. comata (Rydb.) Waterf. Native PHHECivyleaf groundcherry · Solanaceae 1 county
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Physalis heterophylla Nees Native PHHE5clammy groundcherry · Solanaceae 6 counties - Physalis heterophylla Nees var. heterophylla Native PHHEH3clammy groundcherry · Solanaceae 6 counties
- Physalis hispida (Waterf.) Cronquist Native PHHI8prairie groundcherry · Solanaceae 2 counties
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Physalis longifolia Nutt. Native PHLO4longleaf groundcherry · Solanaceae 14 counties - Physalis longifolia Nutt. var. longifolia Native PHLOL3longleaf groundcherry · Solanaceae 13 counties
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Physaria acutifolia Rydb. Native PHAC4sharpleaf twinpod · Brassicaceae 1 county - Physaria acutifolia Rydb. var. acutifolia Native PHACAsharpleaf twinpod · Brassicaceae 1 county
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Physaria brassicoides Rydb. Native PHBR5double twinpod · Brassicaceae 1 county -
Physaria didymocarpa (Hook.) A. Gray Native PHDI6common twinpod · Brassicaceae 21 counties - Physaria didymocarpa (Hook.) A. Gray var. didymocarpa Native PHDIDcommon twinpod · Brassicaceae 2 counties
- Physaria integrifolia (Rollins) Lichvar Native PHIN19Snake River twinpod · Brassicaceae 1 county
- Physaria integrifolia (Rollins) Lichvar var. integrifolia Native PHINISnake River twinpod · Brassicaceae 1 county
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Physaria saximontana Rollins Native PHSA4Fremont County twinpod · Brassicaceae 1 county - Physaria saximontana Rollins var. dentata Native PHSADFremont County twinpod · Brassicaceae 1 county
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Physocarpus malvaceus (Greene) Kuntze Native PHMA5mallow ninebark · Rosaceae 21 counties -
Physocarpus monogynus (Torr.) J.M. Coult. Native PHMO4mountain ninebark · Rosaceae 2 counties -
Physostegia parviflora Nutt. ex A. Gray Native PHPA10western false dragonhead · Lamiaceae 5 counties -
Picea engelmannii Parry ex Engelm. Native PIENEngelmann spruce · Pinaceae 8 counties - Picea engelmannii Parry ex Engelm. var. engelmannii Native PIENEEngelmann spruce · Pinaceae 8 counties
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Picea glauca (Moench) Voss Native PIGLwhite spruce · Pinaceae 2 counties -
Picea pungens Engelm. Native PIPUblue spruce · Pinaceae 1 county -
Picradeniopsis oppositifolia (Nutt.) Rydb. ex Britton Native PIOPoppositeleaf bahia · Asteraceae 17 counties -
Picris echioides L. Introduced PIECbristly oxtongue · Asteraceae 1 county -
Picrothamnus desertorum Nutt. Native PIDE4bud sagebrush · Asteraceae 3 counties -
Pinus albicaulis Engelm. Native PIALwhitebark pine · Pinaceae 4 counties -
Pinus contorta Douglas ex Loudon Native PICOlodgepole pine · Pinaceae 16 counties - Pinus contorta Douglas ex Loudon var. latifolia Engelm. ex S. Watson Native PICOLlodgepole pine · Pinaceae 16 counties
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Pinus flexilis James Native PIFL2limber pine · Pinaceae 9 counties -
Pinus monticola Douglas ex D. Don Native PIMO3western white pine · Pinaceae 4 counties -
Pinus ponderosa Lawson & C. Lawson Native PIPOponderosa pine · Pinaceae 22 counties - Pinus ponderosa Lawson & C. Lawson var. ponderosa C. Lawson Native PIPOPponderosa pine · Pinaceae 5 counties
- Pinus ponderosa Lawson & C. Lawson var. scopulorum Engelm. Native PIPOSponderosa pine · Pinaceae 22 counties
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Piperia unalascensis (Spreng.) Rydb. Native PIUN3slender-spire orchid · Orchidaceae 2 counties -
Piptatheropsis exigua (Thurb.) Romasch., P.M. Peterson & R.J. Soreng Native PIEX4little ricegrass · Poaceae 3 counties -
Piptatheropsis micrantha (Trin. & Rupr.) Romasch., P.M. Peterson & R.J. Soreng Native PIMIlittleseed ricegrass · Poaceae 5 counties -
Plagiobothrys leptocladus (Greene) I.M. Johnst. Native PLLEfinebranched popcornflower · Boraginaceae 2 counties -
Plagiobothrys scouleri (Hook. & Arn.) I.M. Johnst. Native PLSC2Scouler's popcornflower · Boraginaceae 10 counties - Plagiobothrys scouleri (Hook. & Arn.) I.M. Johnst. var. hispidulus (Greene) Dorn Native PLSCHsleeping popcornflower · Boraginaceae 10 counties
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Plantago canescens M.F. Adams Native PLCA3gray pubescent plantain · Plantaginaceae 4 counties -
Plantago elongata Pursh Native PLELprairie plantain · Plantaginaceae 13 counties - Plantago elongata Pursh ssp. elongata Native PLELEprairie plantain · Plantaginaceae 13 counties
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Plantago eriopoda Torr. Native PLERredwool plantain · Plantaginaceae 11 counties -
Plantago lanceolata L. Introduced PLLAnarrowleaf plantain · Plantaginaceae 15 counties -
Plantago major L. Introduced PLMA2common plantain · Plantaginaceae 36 counties -
Plantago patagonica Jacq. Native PLPA2woolly plantain · Plantaginaceae 37 counties -
Plantago rugelii Decne. Native PLRUblackseed plantain · Plantaginaceae 1 county - Plantago rugelii Decne. var. rugelii Native PLRURblackseed plantain · Plantaginaceae 1 county
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Plantago tweedyi A. Gray Native PLTWTweedy's plantain · Plantaginaceae 5 counties -
Platanthera aquilonis Sheviak Native PLAQ2northern green orchid · Orchidaceae 1 county -
Platanthera dilatata (Pursh) Lindl. ex Beck Native PLDI3scentbottle · Orchidaceae 2 counties - Platanthera dilatata (Pursh) Lindl. ex Beck var. albiflora (Cham.) Ledeb. Native PLDIAscentbottle · Orchidaceae 2 counties
- Platanthera dilatata (Pursh) Lindl. ex Beck var. dilatata Native PLDIDscentbottle · Orchidaceae 2 counties
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Platanthera gracilis Lindl. Native PLGR6lax-flowered green orchid · Orchidaceae 1 county -
Platanthera obtusata (Banks ex Pursh) Lindl. Native PLOBbluntleaved orchid · Orchidaceae 2 counties - Platanthera obtusata (Banks ex Pursh) Lindl. ssp. obtusata Native PLOBO3bluntleaved orchid · Orchidaceae 2 counties
- Platanthera stricta Lindl. Native PLST4slender bog orchid · Orchidaceae 2 counties
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Platyschkuhria integrifolia (A. Gray) Rydb. Native PLIN7basindaisy · Asteraceae 1 county - Platyschkuhria integrifolia (A. Gray) Rydb. var. integrifolia Native PLINIbasindaisy · Asteraceae 1 county
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Plectritis macrocera Torr. & A. Gray Native PLMA4longhorn plectritis · Valerianaceae 1 county - Plectritis macrocera Torr. & A. Gray ssp. grayi (Suksd.) Morey Native PLMAGGray's seablush · Valerianaceae 1 county
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Poa abbreviata R. Br. Native POABshort bluegrass · Poaceae 2 counties - Poa abbreviata R. Br. ssp. pattersonii (Vasey) Á. Löve & D. Löve & Kapoor Native POABPPatterson's bluegrass · Poaceae 2 counties
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Poa alpina L. Native POAL2alpine bluegrass · Poaceae 2 counties -
Poa annua L. Introduced POANannual bluegrass · Poaceae 18 counties -
Poa arctica R. Br. Native POAR2arctic bluegrass · Poaceae 2 counties - Poa arctica R. Br. ssp. grayana (Vasey) Á. Löve & D. Löve & Kapoor Native POARGarctic bluegrass · Poaceae 2 counties
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Poa arida Vasey Native POAR3plains bluegrass · Poaceae 5 counties - Poa arnowiae Soreng Native POAR21Wasatch bluegrass · Poaceae 1 county
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Poa bulbosa L. Introduced POBUbulbous bluegrass · Poaceae 22 counties -
Poa compressa L. Introduced POCOCanada bluegrass · Poaceae 45 counties -
Poa cusickii Vasey Native POCU3Cusick's bluegrass · Poaceae 4 counties - Poa cusickii Vasey ssp. epilis (Scribn.) W.A. Weber Native POCUE2Cusick's bluegrass · Poaceae 2 counties
- Poa cusickii Vasey ssp. pallida Soreng Native POCUP3Cusick's bluegrass · Poaceae 4 counties
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Poa fendleriana (Steud.) Vasey Native POFEmuttongrass · Poaceae 3 counties - Poa fendleriana (Steud.) Vasey ssp. fendleriana Native POFEFmuttongrass · Poaceae 1 county
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Poa glauca Vahl Native POGLglaucous bluegrass · Poaceae 3 counties - Poa glauca Vahl ssp. glauca Native POGLGglaucous bluegrass · Poaceae 1 county
- Poa glauca Vahl ssp. rupicola (Nash ex Rydb.) W.A. Weber Native POGLR2timberline bluegrass · Poaceae 2 counties
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Poa leptocoma Trin. Native POLE2marsh bluegrass · Poaceae 2 counties -
Poa lettermanii Vasey Native POLE3Letterman's bluegrass · Poaceae 1 county - Poa nemoralis L. Both PONEwood bluegrass · Poaceae 4 counties
- Poa nemoralis L. ssp. interior (Rydb.) W.A. Weber Native PONEI2inland bluegrass · Poaceae 4 counties
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Poa palustris L. Native POPA2fowl bluegrass · Poaceae 46 counties -
Poa pratensis L. Both POPRKentucky bluegrass · Poaceae 54 counties - Poa pratensis L. ssp. pratensis Introduced POPRP2Kentucky bluegrass · Poaceae 3 counties
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Poa reflexa Vasey & Scribn. ex Vasey Native POREnodding bluegrass · Poaceae 2 counties -
Poa secunda J. Presl Native POSESandberg bluegrass · Poaceae 14 counties -
Poa trivialis L. Introduced POTR2rough bluegrass · Poaceae 9 counties -
Poa wheeleri Vasey Native POWH2Wheeler's bluegrass · Poaceae 3 counties -
Polanisia dodecandra (L.) DC. Native PODO3redwhisker clammyweed · Capparaceae 21 counties - Polanisia dodecandra (L.) DC. ssp. trachysperma (Torr. & A. Gray) Iltis Native PODOTsandyseed clammyweed · Capparaceae 21 counties
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Polemonium micranthum Benth. Native POMIannual polemonium · Polemoniaceae 1 county -
Polemonium occidentale Greene Native POOC2western polemonium · Polemoniaceae 7 counties - Polemonium occidentale Greene ssp. occidentale Native POOCOwestern polemonium · Polemoniaceae 7 counties
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Polemonium pulcherrimum Hook. Native POPU3Jacob's-ladder · Polemoniaceae 21 counties - Polemonium pulcherrimum Hook. ssp. pulcherrimum Native POPUP3Jacob's-ladder · Polemoniaceae 21 counties
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Polemonium viscosum Nutt. Native POVIsticky polemonium · Polemoniaceae 15 counties -
Polygala alba Nutt. Native POAL4white milkwort · Polygalaceae 20 counties -
Polygala verticillata L. Native POVEwhorled milkwort · Polygalaceae 4 counties - Polygala verticillata L. var. isocycla Fernald Native POVEIwhorled milkwort · Polygalaceae 2 counties
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Polygonum achoreum S.F. Blake Native POAC3leathery knotweed · Polygonaceae 16 counties -
Polygonum amphibium L. Native POAM8water knotweed · Polygonaceae 24 counties - Polygonum amphibium L. var. emersum Michx. Native POAMElongroot smartweed · Polygonaceae 14 counties
- Polygonum amphibium L. var. stipulaceum Coleman Native POAMSwater smartweed · Polygonaceae 2 counties
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Polygonum arenastrum Jord. ex Boreau Introduced POAR11oval-leaf knotweed · Polygonaceae 11 counties -
Polygonum aviculare L. Introduced POAVprostrate knotweed · Polygonaceae 53 counties -
Polygonum bistortoides Pursh Native POBI6American bistort · Polygonaceae 28 counties -
Polygonum buxiforme Small Native POBU2box knotweed · Polygonaceae 1 county -
Polygonum convolvulus L. Introduced POCO10black bindweed · Polygonaceae 37 counties - Polygonum convolvulus L. var. convolvulus Introduced POCOC2black bindweed · Polygonaceae 37 counties
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Polygonum cuspidatum Siebold & Zucc. Introduced POCU6Japanese knotweed · Polygonaceae 11 counties -
Polygonum douglasii Greene Native PODO4Douglas' knotweed · Polygonaceae 34 counties - Polygonum douglasii Greene ssp. austiniae (Greene) A.E. Murray Native PODOA2Austin knotweed · Polygonaceae 1 county
- Polygonum douglasii Greene ssp. douglasii Native PODOD4Douglas' knotweed · Polygonaceae 2 counties
- Polygonum douglasii Greene ssp. engelmannii (Greene) Kartesz & Gandhi Native PODOEEngelmann's knotweed · Polygonaceae 2 counties
- Polygonum douglasii Greene ssp. johnstonii (Munz) J.C. Hickman Native PODOJ2Johnston's knotweed · Polygonaceae 4 counties
- Polygonum erectum L. Native POER2erect knotweed · Polygonaceae 8 counties
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Polygonum hydropiper L. Introduced POHYmarshpepper knotweed · Polygonaceae 8 counties -
Polygonum lapathifolium L. Native POLA4curlytop knotweed · Polygonaceae 34 counties - Polygonum leptocarpum B.L. Rob. Native POLE6narrowpoint knotweed · Polygonaceae 2 counties
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Polygonum minimum S. Watson Native POMI2broadleaf knotweed · Polygonaceae 4 counties -
Polygonum pensylvanicum L. Native POPE2Pennsylvania smartweed · Polygonaceae 2 counties - Polygonum persicaria L. Introduced POPE3spotted ladysthumb · Polygonaceae 26 counties
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Polygonum phytolaccifolium Meisn. ex Small Native POPHpoke knotweed · Polygonaceae 1 county -
Polygonum polygaloides Wall. ex Meisn. Native POPO4milkwort knotweed · Polygonaceae 8 counties - Polygonum polygaloides Wall. ex Meisn. ssp. confertiflorum (Nutt. ex Piper) J.C. Hickman Native POPOCfruitleaf knotweed · Polygonaceae 6 counties
- Polygonum polygaloides Wall. ex Meisn. ssp. kelloggii (Greene) J.C. Hickman Native POPOKKellogg's knotweed · Polygonaceae 4 counties
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Polygonum punctatum Elliott Native POPU5dotted smartweed · Polygonaceae 2 counties - Polygonum punctatum Elliott var. confertiflorum (Meisn.) Fassett Native POPUC2dotted smartweed · Polygonaceae 2 counties
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Polygonum ramosissimum Michx. Native PORA3bushy knotweed · Polygonaceae 17 counties - Polygonum ramosissimum Michx. var. ramosissimum Native PORARbushy knotweed · Polygonaceae 15 counties
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Polygonum sachalinense F. Schmidt ex Maxim. Introduced POSA4giant knotweed · Polygonaceae 21 counties -
Polygonum scandens L. Both POSC3climbing false buckwheat · Polygonaceae 1 county - Polygonum scandens L. var. scandens Native POSCSclimbing false buckwheat · Polygonaceae 1 county
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Polygonum viviparum L. Native POVI3alpine bistort · Polygonaceae 8 counties -
Polypogon monspeliensis (L.) Desf. Introduced POMO5annual rabbitsfoot grass · Poaceae 20 counties -
Polystichum lonchitis (L.) Roth Native POLO4northern hollyfern · Dryopteridaceae 2 counties -
Polystichum scopulinum (D.C. Eaton) Maxon Native POSC5mountain hollyfern · Dryopteridaceae 1 county -
Populus alba L. Introduced POAL7white poplar · Salicaceae 12 counties -
Populus angustifolia James Native POAN3narrowleaf cottonwood · Salicaceae 20 counties -
Populus balsamifera L. Native POBA2balsam poplar · Salicaceae 32 counties - Populus balsamifera L. ssp. balsamifera Native POBAB2balsam poplar · Salicaceae 1 county
- Populus balsamifera L. ssp. trichocarpa (Torr. & A. Gray ex Hook.) Brayshaw Native POBATblack cottonwood · Salicaceae 31 counties
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Populus deltoides W. Bartram ex Marshall Native PODE3eastern cottonwood · Salicaceae 39 counties - Populus deltoides W. Bartram ex Marshall ssp. monilifera (Aiton) Eckenwalder Native PODEMplains cottonwood · Salicaceae 39 counties
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Populus tremuloides Michx. Native POTR5quaking aspen · Salicaceae 34 counties - Populus ×acuminata Rydb. (pro sp.) [angustifolia × deltoides] Native POAC5lanceleaf cottonwood · Salicaceae 9 counties
- Populus ×brayshawii B. Boivin [angustifolia × balsamifera] Native POBR7hybrid balsam poplar · Salicaceae 1 county
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Porterella carnosula (Hook. & Arn.) Torr. Native POCA15fleshy porterella · Campanulaceae 1 county -
Portulaca oleracea L. Both POOLlittle hogweed · Portulacaceae 32 counties -
Potamogeton alpinus Balbis Native POAL8alpine pondweed · Potamogetonaceae 3 counties -
Potamogeton amplifolius Tuck. Native POAM5largeleaf pondweed · Potamogetonaceae 1 county -
Potamogeton crispus L. Introduced POCR3curly pondweed · Potamogetonaceae 2 counties -
Potamogeton diversifolius Raf. Native PODIwaterthread pondweed · Potamogetonaceae 3 counties -
Potamogeton epihydrus Raf. Native POEP2ribbonleaf pondweed · Potamogetonaceae 2 counties -
Potamogeton foliosus Raf. Native POFO3leafy pondweed · Potamogetonaceae 9 counties - Potamogeton foliosus Raf. ssp. foliosus Native POFOF4leafy pondweed · Potamogetonaceae 2 counties
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Potamogeton friesii Rupr. Native POFR3Fries' pondweed · Potamogetonaceae 6 counties -
Potamogeton gramineus L. Native POGR8variableleaf pondweed · Potamogetonaceae 4 counties -
Potamogeton natans L. Native PONA4floating pondweed · Potamogetonaceae 4 counties -
Potamogeton obtusifolius Mert. & W.D.J. Koch Native POOB2bluntleaf pondweed · Potamogetonaceae 1 county -
Potamogeton praelongus Wulfen Native POPR5whitestem pondweed · Potamogetonaceae 2 counties -
Potamogeton pusillus L. Native POPU7small pondweed · Potamogetonaceae 8 counties - Potamogeton pusillus L. ssp. pusillus Native POPUP5small pondweed · Potamogetonaceae 2 counties
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Potamogeton richardsonii (Benn.) Rydb. Native PORI2Richardson's pondweed · Potamogetonaceae 11 counties -
Potamogeton zosteriformis Fernald Native POZOflatstem pondweed · Potamogetonaceae 7 counties -
Potentilla argentea L. Introduced POAR8silver cinquefoil · Rosaceae 12 counties - Potentilla argentea L. var. argentea Introduced POARA3silver cinquefoil · Rosaceae 12 counties
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Potentilla arguta Pursh Native POAR7tall cinquefoil · Rosaceae 31 counties - Potentilla arguta Pursh ssp. arguta Native POARA4tall cinquefoil · Rosaceae 4 counties
- Potentilla arguta Pursh ssp. convallaria (Rydb.) D.D. Keck Native POARCcream cinquefoil · Rosaceae 2 counties
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Potentilla biennis Greene Native POBI7biennial cinquefoil · Rosaceae 7 counties -
Potentilla bipinnatifida Douglas ex Hook. Native POBI10tansy cinquefoil · Rosaceae 3 counties -
Potentilla brevifolia Nutt. ex Torr. & A. Gray Native POBR5sparseleaf cinquefoil · Rosaceae 2 counties -
Potentilla concinna Richardson Native POCO13elegant cinquefoil · Rosaceae 9 counties - Potentilla concinna Richardson var. concinna Native POCOC3elegant cinquefoil · Rosaceae 9 counties
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Potentilla diversifolia Lehm. Native PODI2varileaf cinquefoil · Rosaceae 17 counties - Potentilla diversifolia Lehm. var. diversifolia Native PODIDvarileaf cinquefoil · Rosaceae 2 counties
- Potentilla diversifolia Lehm. var. perdissecta (Rydb.) C.L. Hitchc. Native PODIPmountainmeadow cinquefoil · Rosaceae 2 counties
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Potentilla effusa Douglas ex Lehm. Native POEFbranched cinquefoil · Rosaceae 2 counties -
Potentilla fissa Nutt. Native POFI3bigflower cinquefoil · Rosaceae 2 counties -
Potentilla flabellifolia Hook. ex Torr. & A. Gray Native POFL3high mountain cinquefoil · Rosaceae 3 counties -
Potentilla glandulosa Lindl. Native POGL9sticky cinquefoil · Rosaceae 22 counties - Potentilla glandulosa Lindl. ssp. glabrata (Rydb.) D.D. Keck Native POGLG3sticky cinquefoil · Rosaceae 2 counties
- Potentilla glandulosa Lindl. ssp. pseudorupestris (Rydb.) D.D. Keck Native POGLPsticky cinquefoil · Rosaceae 2 counties
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Potentilla gracilis Douglas ex Hook. Native POGR9slender cinquefoil · Rosaceae 37 counties - Potentilla gracilis Douglas ex Hook. var. brunnescens (Rydb.) C.L. Hitchc. Native POGRBslender cinquefoil · Rosaceae 2 counties
- Potentilla gracilis Douglas ex Hook. var. fastigiata (Nutt.) S. Watson Native POGRF2slender cinquefoil · Rosaceae 5 counties
- Potentilla gracilis Douglas ex Hook. var. flabelliformis (Lehm.) Nutt. ex Torr. & A. Gray Native POGRFslender cinquefoil · Rosaceae 1 county
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Potentilla hippiana Lehm. Native POHI6woolly cinquefoil · Rosaceae 15 counties - Potentilla hippiana Lehm. var. hippiana Native POHIHwoolly cinquefoil · Rosaceae 15 counties
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Potentilla hookeriana Lehm. Native POHO2Hooker's cinquefoil · Rosaceae 3 counties - Potentilla hookeriana Lehm. ssp. hookeriana Native POHOHHooker's cinquefoil · Rosaceae 3 counties
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Potentilla nivea L. Native PONI2snow cinquefoil · Rosaceae 2 counties - Potentilla nivea L. var. pentaphylla Lehm. Native PONIPfiveleaf cinquefoil · Rosaceae 2 counties
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Potentilla norvegica L. Native PONO3Norwegian cinquefoil · Rosaceae 16 counties - Potentilla norvegica L. ssp. monspeliensis (L.) Asch. & Graebn. Native PONOMNorwegian cinquefoil · Rosaceae 16 counties
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Potentilla ovina Macoun ex J.M. Macoun Native POOV2sheep cinquefoil · Rosaceae 17 counties - Potentilla ovina Macoun ex J.M. Macoun var. ovina Native POOVOsheep cinquefoil · Rosaceae 2 counties
- Potentilla paradoxa Nutt. Native POPA15Paradox cinquefoil · Rosaceae 8 counties
- Potentilla pectinisecta Rydb. Native POPE23combleaf cinquefoil · Rosaceae 2 counties
- Potentilla pensylvanica L. Native POPE8Pennsylvania cinquefoil · Rosaceae 31 counties
- Potentilla pensylvanica L. var. pensylvanica Native POPEP5Pennsylvania cinquefoil · Rosaceae 31 counties
- Potentilla plattensis Nutt. Native POPLPlatte River cinquefoil · Rosaceae 1 county
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Potentilla pulcherrima Lehm. Native POPU9beautiful cinquefoil · Rosaceae 4 counties -
Potentilla recta L. Introduced PORE5sulphur cinquefoil · Rosaceae 33 counties -
Potentilla rivalis Nutt. Native PORI3brook cinquefoil · Rosaceae 3 counties -
Potentilla rubricaulis Lehm. Native PORU3Rocky Mountain cinquefoil · Rosaceae 1 county -
Potentilla subjuga Rydb. Native POSU5Colorado cinquefoil · Rosaceae 1 county -
Potentilla uniflora Ledeb. Native POUN2oneflower cinquefoil · Rosaceae 2 counties -
Prenanthes sagittata (A. Gray) A. Nelson Native PRSAarrowleaf rattlesnakeroot · Asteraceae 7 counties -
Primula alcalina Cholewa & Douglass M. Hend. Native PRAL6bluedome primrose · Primulaceae 1 county -
Primula egaliksensis Wormsk. ex Hornem. Native PREGGreenland primrose · Primulaceae 1 county -
Primula incana M.E. Jones Native PRINsilvery primrose · Primulaceae 6 counties -
Primula parryi A. Gray Native PRPAParry's primrose · Primulaceae 3 counties -
Prosartes hookeri Torr. Native PRHO2drops-of-gold · Liliaceae 2 counties - Prosartes hookeri Torr. var. oregana (S. Watson) Kartesz Native PRHOOOregon drops of gold · Liliaceae 2 counties
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Prosartes trachycarpa S. Watson Native PRTR4roughfruit fairybells · Liliaceae 20 counties -
Prunella vulgaris L. Native PRVUcommon selfheal · Lamiaceae 23 counties - Prunella vulgaris L. ssp. lanceolata (W. Bartram) Hultén Native PRVUL2lance selfheal · Lamiaceae 22 counties
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Prunus americana Marshall Native PRAMAmerican plum · Rosaceae 14 counties -
Prunus cerasus L. Introduced PRCEsour cherry · Rosaceae 1 county -
Prunus emarginata (Douglas ex Hook.) D. Dietr. Native PREMbitter cherry · Rosaceae 1 county - Prunus emarginata (Douglas ex Hook.) D. Dietr. var. emarginata Native PREMEbitter cherry · Rosaceae 1 county
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Prunus mahaleb L. Introduced PRMAMahaleb cherry · Rosaceae 1 county -
Prunus pensylvanica L. f. Native PRPE2pin cherry · Rosaceae 3 counties -
Prunus pumila L. Native PRPU3sandcherry · Rosaceae 1 county - Prunus pumila L. var. besseyi (L.H. Bailey) Gleason Native PRPUBwestern sandcherry · Rosaceae 1 county
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Prunus virginiana L. Native PRVIchokecherry · Rosaceae 42 counties - Prunus virginiana L. var. melanocarpa (A. Nelson) Sarg. Native PRVIMblack chokecherry · Rosaceae 41 counties
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Psathyrostachys juncea (Fisch.) Nevski Introduced PSJU3Russian wildrye · Poaceae 13 counties -
Pseudognaphalium canescens (DC.) W.A. Weber Native PSCA11Wright's cudweed · Asteraceae 6 counties - Pseudognaphalium canescens (DC.) W.A. Weber ssp. thermale (E.E. Nelson) Kartesz Native PSCATWright's cudweed · Asteraceae 6 counties
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Pseudognaphalium macounii (Greene) Kartesz Native PSMA11Macoun's cudweed · Asteraceae 4 counties -
Pseudognaphalium stramineum (Kunth) Anderb. Native PSST7cottonbatting plant · Asteraceae 3 counties - Pseudolysimachion longifolium (L.) Opiz Introduced PSLO6longleaf speedwell · Scrophulariaceae 2 counties
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Pseudoroegneria spicata (Pursh) Á. Löve Native PSSP6bluebunch wheatgrass · Poaceae 15 counties - Pseudoroegneria spicata (Pursh) Á. Löve ssp. spicata Native PSSPSbluebunch wheatgrass · Poaceae 15 counties
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Pseudostellaria jamesiana (Torr.) W.A. Weber & R.L. Hartm. Native PSJA2tuber starwort · Caryophyllaceae 1 county -
Pseudotsuga menziesii (Mirb.) Franco Native PSMEDouglas-fir · Pinaceae 4 counties - Pseudotsuga menziesii (Mirb.) Franco var. glauca (Beissn.) Franco Native PSMEGRocky Mountain Douglas-fir · Pinaceae 4 counties
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Psilocarphus brevissimus Nutt. Native PSBRshort woollyheads · Asteraceae 1 county - Psilocarphus brevissimus Nutt. var. brevissimus Native PSBRBshort woollyheads · Asteraceae 1 county
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Psilocarphus tenellus Nutt. Native PSTEslender woollyheads · Asteraceae 1 county -
Psoralidium lanceolatum (Pursh) Rydb. Native PSLA3lemon scurfpea · Fabaceae 5 counties -
Psoralidium tenuiflorum (Pursh) Rydb. Native PSTE5slimflower scurfpea · Fabaceae 6 counties -
Pteridium aquilinum (L.) Kuhn Native PTAQwestern brackenfern · Dennstaedtiaceae 1 county - Pteridium aquilinum (L.) Kuhn var. pubescens Underw. Native PTAQP2hairy brackenfern · Dennstaedtiaceae 1 county
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Pterospora andromedea Nutt. Native PTAN2woodland pinedrops · Monotropaceae 18 counties -
Pteryxia hendersonii (J.M. Coult. & Rose) Mathias & Constance Native PTHEHenderson's wavewing · Apiaceae 3 counties -
Pteryxia terebinthina (Hook.) J.M. Coult. & Rose Native PTTEturpentine wavewing · Apiaceae 20 counties - Pteryxia terebinthina (Hook.) J.M. Coult. & Rose var. albiflora (Torr. & A. Gray) Mathias Native PTTEAturpentine wavewing · Apiaceae 2 counties
- Pteryxia terebinthina (Hook.) J.M. Coult. & Rose var. foeniculacea (Nutt. ex Torr. & A. Gray) Mathias Native PTTEFturpentine wavewing · Apiaceae 19 counties
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Puccinellia distans (Jacq.) Parl. Both PUDIweeping alkaligrass · Poaceae 17 counties - Puccinellia distans (Jacq.) Parl. ssp. distans Introduced PUDIDweeping alkaligrass · Poaceae 16 counties
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Puccinellia nuttalliana (Schult.) Hitchc. Native PUNU2Nuttall's alkaligrass · Poaceae 10 counties -
Pulsatilla occidentalis (S. Watson) Freyn Native PUOCwhite pasqueflower · Ranunculaceae 1 county -
Pulsatilla patens (L.) Mill. Native PUPA5eastern pasqueflower · Ranunculaceae 32 counties - Pulsatilla patens (L.) Mill. ssp. multifida (Pritz.) Zamels Native PUPAMcutleaf anemone · Ranunculaceae 32 counties
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Purshia tridentata (Pursh) DC. Native PUTR2antelope bitterbrush · Rosaceae 12 counties -
Pyrola asarifolia Michx. Native PYASliverleaf wintergreen · Pyrolaceae 21 counties - Pyrola asarifolia Michx. ssp. asarifolia Native PYASAliverleaf wintergreen · Pyrolaceae 3 counties
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Pyrola chlorantha Sw. Native PYCHgreenflowered wintergreen · Pyrolaceae 15 counties -
Pyrola minor L. Native PYMIsnowline wintergreen · Pyrolaceae 4 counties -
Pyrola picta Sm. Native PYPI2whiteveined wintergreen · Pyrolaceae 5 counties -
Pyrrocoma carthamoides Hook. Native PYCA3largeflower goldenweed · Asteraceae 2 counties - Pyrrocoma carthamoides Hook. var. carthamoides Native PYCAC2largeflower goldenweed · Asteraceae 1 county
- Pyrrocoma carthamoides Hook. var. subsquarrosa (Greene) G. Brown & Keil Native PYCASlargeflower goldenweed · Asteraceae 1 county
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Pyrrocoma integrifolia (Porter ex A. Gray) Greene Native PYIN3many-stemmed goldenweed · Asteraceae 8 counties -
Pyrrocoma lanceolata (Hook.) Greene Native PYLAlanceleaf goldenweed · Asteraceae 3 counties - Pyrrocoma lanceolata (Hook.) Greene var. lanceolata Native PYLALlanceleaf goldenweed · Asteraceae 3 counties
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Pyrrocoma uniflora (Hook.) Greene Native PYUN2plantain goldenweed · Asteraceae 5 counties - Pyrrocoma uniflora (Hook.) Greene var. uniflora Native PYUNUplantain goldenweed · Asteraceae 5 counties
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Pyrus communis L. Introduced PYCOcommon pear · Rosaceae 1 county -
Quercus macrocarpa Michx. Native QUMA2bur oak · Fagaceae 3 counties -
Ranunculus abortivus L. Native RAABlittleleaf buttercup · Ranunculaceae 10 counties -
Ranunculus acriformis A. Gray Native RAAC2sharpleaf buttercup · Ranunculaceae 14 counties - Ranunculus acriformis A. Gray var. montanensis (Rydb.) L.D. Benson Native RAACMmountain sharp buttercup · Ranunculaceae 14 counties
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Ranunculus acris L. Both RAAC3tall buttercup · Ranunculaceae 26 counties - Ranunculus acris L. var. acris Introduced RAACA3showy buttercup · Ranunculaceae 26 counties
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Ranunculus adoneus A. Gray Native RAADalpine buttercup · Ranunculaceae 1 county -
Ranunculus alismifolius Geyer ex Benth. Native RAALplantainleaf buttercup · Ranunculaceae 5 counties - Ranunculus alismifolius Geyer ex Benth. var. alismifolius Native RAALA2plantainleaf buttercup · Ranunculaceae 1 county
- Ranunculus alismifolius Geyer ex Benth. var. montanus S. Watson Native RAALMwaterplantain buttercup · Ranunculaceae 1 county
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Ranunculus aquatilis L. Native RAAQwhite water crowfoot · Ranunculaceae 13 counties -
Ranunculus arvensis L. Introduced RAAR3corn buttercup · Ranunculaceae 5 counties -
Ranunculus cymbalaria Pursh Native RACYalkali buttercup · Ranunculaceae 30 counties -
Ranunculus eschscholtzii Schltdl. Native RAESEschscholtz's buttercup · Ranunculaceae 18 counties - Ranunculus eschscholtzii Schltdl. var. eschscholtzii Native RAESE2Eschscholtz's buttercup · Ranunculaceae 18 counties
- Ranunculus eschscholtzii Schltdl. var. trisectus (Eastw.) L.D. Benson Native RAESTthreesection buttercup · Ranunculaceae 2 counties
- Ranunculus eximius Greene Native RAEXtundra buttercup · Ranunculaceae 2 counties
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Ranunculus flabellaris Raf. Native RAFLyellow water buttercup · Ranunculaceae 1 county -
Ranunculus flammula L. Native RAFL2greater creeping spearwort · Ranunculaceae 10 counties - Ranunculus flammula L. var. filiformis (Michx.) Hook. Native RAFLFgreater creeping spearwort · Ranunculaceae 1 county
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Ranunculus glaberrimus Hook. Native RAGLsagebrush buttercup · Ranunculaceae 44 counties - Ranunculus glaberrimus Hook. var. ellipticus (Greene) Greene Native RAGLEelliptical buttercup · Ranunculaceae 3 counties
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Ranunculus gmelinii DC. Native RAGMGmelin's buttercup · Ranunculaceae 14 counties -
Ranunculus hyperboreus Rottb. Native RAHY2high northern buttercup · Ranunculaceae 13 counties -
Ranunculus inamoenus Greene Native RAINgraceful buttercup · Ranunculaceae 12 counties - Ranunculus inamoenus Greene var. alpeophilus (A. Nelson) L.D. Benson Native RAINAgraceful buttercup · Ranunculaceae 2 counties
- Ranunculus inamoenus Greene var. inamoenus Native RAINI2graceful buttercup · Ranunculaceae 2 counties
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Ranunculus jovis A. Nelson Native RAJOUtah buttercup · Ranunculaceae 3 counties -
Ranunculus longirostris Godr. Native RALO2longbeak buttercup · Ranunculaceae 6 counties -
Ranunculus macounii Britton Native RAMA2Macoun's buttercup · Ranunculaceae 24 counties -
Ranunculus orthorhynchus Hook. Native RAOR3straightbeak buttercup · Ranunculaceae 2 counties - Ranunculus orthorhynchus Hook. var. orthorhynchus Native RAOROstraightbeak buttercup · Ranunculaceae 2 counties
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Ranunculus pedatifidus Sm. Native RAPEsurefoot buttercup · Ranunculaceae 2 counties - Ranunculus pedatifidus Sm. var. affinis (R. Br.) L.D. Benson Native RAPEAnorthern buttercup · Ranunculaceae 2 counties
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Ranunculus pensylvanicus L. f. Native RAPE2Pennsylvania buttercup · Ranunculaceae 3 counties -
Ranunculus populago Greene Native RAPOpopular buttercup · Ranunculaceae 1 county -
Ranunculus pygmaeus Wahlenb. Native RAPYpygmy buttercup · Ranunculaceae 2 counties - Ranunculus pygmaeus Wahlenb. var. pygmaeus Native RAPYP2pygmy buttercup · Ranunculaceae 2 counties
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Ranunculus repens L. Introduced RARE3creeping buttercup · Ranunculaceae 15 counties -
Ranunculus sceleratus L. Native RASC3cursed buttercup · Ranunculaceae 12 counties - Ranunculus sceleratus L. var. multifidus Nutt. Native RASCMcursed buttercup · Ranunculaceae 11 counties
- Ranunculus suksdorfii A. Gray Native RASU4Suksdorf's buttercup · Ranunculaceae 1 county
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Ranunculus sulphureus Sol. ex C.J. Phipps Native RASU2sulphur buttercup · Ranunculaceae 1 county -
Ranunculus trichophyllus Chaix Native RATRthreadleaf crowfoot · Ranunculaceae 4 counties - Ranunculus trichophyllus Chaix var. trichophyllus Native RATRTthreadleaf crowfoot · Ranunculaceae 4 counties
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Ranunculus uncinatus D. Don ex G. Don Native RAUNwoodland buttercup · Ranunculaceae 20 counties - Ranunculus uncinatus D. Don ex G. Don var. parviflorus (Torr.) L.D. Benson Native RAUNPIdaho buttercup · Ranunculaceae 1 county
- Ranunculus uncinatus D. Don ex G. Don var. uncinatus Native RAUNUwoodland buttercup · Ranunculaceae 2 counties
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Ranunculus verecundus B.L. Rob. ex Piper Native RAVEwetslope buttercup · Ranunculaceae 2 counties -
Raphanus raphanistrum L. Introduced RARA2wild radish · Brassicaceae 3 counties - Raphanus sativus L. Introduced RASA2cultivated radish · Brassicaceae 2 counties
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Ratibida columnifera (Nutt.) Wooton & Standl. Native RACO3upright prairie coneflower · Asteraceae 47 counties -
Reseda lutea L. Introduced RELUyellow mignonette · Resedaceae 4 counties -
Rhamnus alnifolia L'Hér. Native RHALalderleaf buckthorn · Rhamnaceae 11 counties -
Rhamnus cathartica L. Introduced RHCA3common buckthorn · Rhamnaceae 27 counties -
Rhinanthus minor L. Native RHMI13little yellow rattle · Scrophulariaceae 3 counties - Rhinanthus minor L. ssp. minor Native RHMIMlittle yellow rattle · Scrophulariaceae 3 counties
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Rhodiola integrifolia Raf. Native RHIN11ledge stonecrop · Crassulaceae 12 counties - Rhodiola integrifolia Raf. ssp. integrifolia Native RHINIledge stonecrop · Crassulaceae 12 counties
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Rhodiola rhodantha (A. Gray) H. Jacobsen Native RHRH4redpod stonecrop · Crassulaceae 6 counties -
Rhododendron albiflorum Hook. Native RHAL2Cascade azalea · Ericaceae 3 counties - Rhododendron albiflorum Hook. var. albiflorum Native RHALACascade azalea · Ericaceae 3 counties
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Rhus glabra L. Native RHGLsmooth sumac · Anacardiaceae 3 counties -
Rhus trilobata Nutt. Native RHTRskunkbush sumac · Anacardiaceae 39 counties - Rhus trilobata Nutt. var. trilobata Native RHTRTskunkbush sumac · Anacardiaceae 39 counties
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Ribes americanum Mill. Native RIAM2American black currant · Grossulariaceae 15 counties -
Ribes aureum Pursh Native RIAUgolden currant · Grossulariaceae 35 counties - Ribes aureum Pursh var. aureum Native RIAUAgolden currant · Grossulariaceae 3 counties
- Ribes aureum Pursh var. villosum DC. Native RIAUVgolden currant · Grossulariaceae 19 counties
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Ribes cereum Douglas Native RICEwax currant · Grossulariaceae 30 counties - Ribes cereum Douglas var. pedicellare W.H. Brewer & S. Watson Native RICEPwhisky currant · Grossulariaceae 8 counties
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Ribes hirtellum Michx. Native RIHIhairystem gooseberry · Grossulariaceae 2 counties -
Ribes hudsonianum Richardson Native RIHUnorthern black currant · Grossulariaceae 8 counties - Ribes hudsonianum Richardson var. petiolare (Douglas) Jancz. Native RIHUPwestern black currant · Grossulariaceae 8 counties
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Ribes inerme Rydb. Native RIIN2whitestem gooseberry · Grossulariaceae 3 counties - Ribes inerme Rydb. var. inerme Native RIINIwhitestem gooseberry · Grossulariaceae 3 counties
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Ribes lacustre (Pers.) Poir. Native RILAprickly currant · Grossulariaceae 16 counties -
Ribes missouriense Nutt. Native RIMIMissouri gooseberry · Grossulariaceae 3 counties -
Ribes montigenum McClatchie Native RIMO2gooseberry currant · Grossulariaceae 22 counties - Ribes oxyacanthoides L. Native RIOXCanadian gooseberry · Grossulariaceae 35 counties
- Ribes oxyacanthoides L. ssp. irriguum (Douglas) Sinnott Native RIOXIIdaho gooseberry · Grossulariaceae 3 counties
- Ribes oxyacanthoides L. ssp. oxyacanthoides Native RIOXOCanadian gooseberry · Grossulariaceae 4 counties
- Ribes oxyacanthoides L. ssp. setosum (Lindl.) Sinnott Native RIOXSinland gooseberry · Grossulariaceae 27 counties
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Ribes rubrum L. Introduced RIRU80cultivated currant · Grossulariaceae 3 counties -
Ribes viscosissimum Pursh Native RIVI3sticky currant · Grossulariaceae 15 counties -
Romanzoffia sitchensis Bong. Native ROSISitka mistmaiden · Hydrophyllaceae 1 county -
Rorippa alpina (S. Watson) Rydb. Native ROALalpine yellowcress · Brassicaceae 2 counties -
Rorippa austriaca (Crantz) Besser Introduced ROAUAustrian yellowcress · Brassicaceae 3 counties -
Rorippa calycina (Engelm.) Rydb. Native ROCApersistent sepal yellowcress · Brassicaceae 5 counties -
Rorippa curvipes Greene Native ROCU2bluntleaf yellowcress · Brassicaceae 11 counties - Rorippa curvipes Greene var. curvipes Native ROCUCbluntleaf yellowcress · Brassicaceae 3 counties
- Rorippa curvipes Greene var. truncata (Jeps.) Rollins Native ROCUTbluntleaf yellowcress · Brassicaceae 2 counties
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Rorippa curvisiliqua (Hook.) Besser ex Britton Native ROCUcurvepod yellowcress · Brassicaceae 18 counties -
Rorippa palustris (L.) Besser Native ROPA2bog yellowcress · Brassicaceae 13 counties - Rorippa palustris (L.) Besser ssp. fernaldiana (Butters & Abbe) Jonsell Native ROPAF2Fernald's yellowcress · Brassicaceae 9 counties
- Rorippa palustris (L.) Besser ssp. hispida (Desv.) Jonsell Native ROPAHhispid yellowcress · Brassicaceae 3 counties
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Rorippa sinuata (Nutt.) Hitchc. Native ROSI2spreading yellowcress · Brassicaceae 18 counties -
Rorippa sylvestris (L.) Besser Introduced ROSYcreeping yellowcress · Brassicaceae 3 counties -
Rorippa tenerrima Greene Native ROTEModoc yellowcress · Brassicaceae 1 county -
Rosa acicularis Lindl. Native ROACprickly rose · Rosaceae 17 counties - Rosa acicularis Lindl. ssp. sayi (Schwein.) W.H. Lewis Native ROACSprickly rose · Rosaceae 17 counties
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Rosa arkansana Porter Native ROAR3prairie rose · Rosaceae 23 counties - Rosa arkansana Porter var. arkansana Native ROARAprairie rose · Rosaceae 2 counties
- Rosa arkansana Porter var. suffulta (Greene) Cockerell Native ROARSprairie rose · Rosaceae 23 counties
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Rosa gymnocarpa Nutt. Native ROGYdwarf rose · Rosaceae 4 counties - Rosa gymnocarpa Nutt. var. gymnocarpa Native ROGYGdwarf rose · Rosaceae 4 counties
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Rosa nutkana C. Presl Native RONUNootka rose · Rosaceae 11 counties - Rosa nutkana C. Presl var. hispida Fernald Native RONUHbristly Nootka rose · Rosaceae 11 counties
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Rosa rubiginosa L. Introduced RORU82sweetbriar rose · Rosaceae 2 counties -
Rosa woodsii Lindl. Native ROWOWoods' rose · Rosaceae 33 counties - Rosa woodsii Lindl. var. woodsii Native ROWOWWoods' rose · Rosaceae 5 counties
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Rubus arcticus L. Native RUARarctic raspberry · Rosaceae 1 county - Rubus arcticus L. ssp. acaulis (Michx.) Focke Native RUARA2dwarf raspberry · Rosaceae 1 county
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Rubus idaeus L. Both RUIDAmerican red raspberry · Rosaceae 22 counties - Rubus idaeus L. ssp. strigosus (Michx.) Focke Native RUIDS2grayleaf red raspberry · Rosaceae 7 counties
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Rubus laciniatus Willd. Introduced RULAcutleaf blackberry · Rosaceae 4 counties -
Rubus leucodermis Douglas ex Torr. & A. Gray Native RULEwhitebark raspberry · Rosaceae 5 counties - Rubus leucodermis Douglas ex Torr. & A. Gray var. leucodermis Native RULELwhitebark raspberry · Rosaceae 5 counties
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Rubus parviflorus Nutt. Native RUPAthimbleberry · Rosaceae 19 counties - Rubus parviflorus Nutt. var. parviflorus Native RUPAP2thimbleberry · Rosaceae 19 counties
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Rubus pedatus Sm. Native RUPEstrawberryleaf raspberry · Rosaceae 1 county -
Rubus pubescens Raf. Native RUPUdwarf red blackberry · Rosaceae 1 county - Rubus pubescens Raf. var. pubescens Native RUPUP2dwarf red blackberry · Rosaceae 1 county
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Rudbeckia laciniata L. Native RULA3cutleaf coneflower · Asteraceae 14 counties -
Rudbeckia occidentalis Nutt. Native RUOC2western coneflower · Asteraceae 4 counties -
Rumex acetosa L. Both RUAC2garden sorrel · Polygonaceae 6 counties - Rumex acetosa L. ssp. acetosa Introduced RUACAgarden sorrel · Polygonaceae 6 counties
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Rumex acetosella L. Introduced RUAC3common sheep sorrel · Polygonaceae 33 counties -
Rumex aquaticus L. Native RUAQwestern dock · Polygonaceae 14 counties - Rumex aquaticus L. var. fenestratus (Greene) Dorn Native RUAQFwestern dock · Polygonaceae 14 counties
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Rumex crispus L. Introduced RUCRcurly dock · Polygonaceae 55 counties - Rumex crispus L. ssp. crispus Introduced RUCRCcurly dock · Polygonaceae 55 counties
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Rumex longifolius DC. Introduced RULO2dooryard dock · Polygonaceae 1 county -
Rumex maritimus L. Native RUMA4golden dock · Polygonaceae 16 counties -
Rumex obtusifolius L. Introduced RUOBbitter dock · Polygonaceae 3 counties - Rumex patientia L. Introduced RUPA5patience dock · Polygonaceae 8 counties
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Rumex paucifolius Nutt. Native RUPA6alpine sheep sorrel · Polygonaceae 13 counties - Rumex paucifolius Nutt. ssp. paucifolius Native RUPAPalpine sheep sorrel · Polygonaceae 13 counties
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Rumex salicifolius Weinm. Native RUSAwillow dock · Polygonaceae 35 counties - Rumex salicifolius Weinm. var. denticulatus Torr. Native RUSADtoothed willow dock · Polygonaceae 4 counties
- Rumex salicifolius Weinm. var. mexicanus (Meisn.) C.L. Hitchc. Native RUSAMMexican dock · Polygonaceae 17 counties
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Rumex sanguineus L. Introduced RUSA2redvein dock · Polygonaceae 1 county -
Rumex stenophyllus Ledeb. Introduced RUST4narrowleaf dock · Polygonaceae 11 counties -
Rumex venosus Pursh Native RUVE2veiny dock · Polygonaceae 7 counties -
Ruppia cirrhosa (Petagna) Grande Native RUCI2spiral ditchgrass · Ruppiaceae 1 county -
Sagina procumbens L. Introduced SAPRbirdeye pearlwort · Caryophyllaceae 2 counties -
Sagina saginoides (L.) Karst. Native SASAarctic pearlwort · Caryophyllaceae 8 counties -
Sagittaria calycina Engelm. Native SACA21hooded arrowhead · Alismataceae 1 county - Sagittaria calycina Engelm. var. calycina Native SACAChooded arrowhead · Alismataceae 1 county
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Sagittaria cuneata Sheldon Native SACUarumleaf arrowhead · Alismataceae 23 counties -
Sagittaria latifolia Willd. Native SALA2broadleaf arrowhead · Alismataceae 5 counties -
Salicornia rubra A. Nelson Native SARUred swampfire · Chenopodiaceae 5 counties -
Salix alba L. Introduced SAAL2white willow · Salicaceae 5 counties -
Salix amygdaloides Andersson Native SAAM2peachleaf willow · Salicaceae 25 counties -
Salix arctica Pall. Native SAAR27arctic willow · Salicaceae 9 counties -
Salix barclayi Andersson Native SABA3Barclay's willow · Salicaceae 4 counties -
Salix barrattiana Hook. Native SABA4Barratt's willow · Salicaceae 3 counties -
Salix bebbiana Sarg. Native SABE2Bebb willow · Salicaceae 28 counties -
Salix boothii Dorn Native SABO2Booth's willow · Salicaceae 4 counties -
Salix brachycarpa Nutt. Native SABRshortfruit willow · Salicaceae 2 counties - Salix brachycarpa Nutt. var. brachycarpa Native SABRB7shortfruit willow · Salicaceae 2 counties
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Salix candida Flueggé ex Willd. Native SACA4sageleaf willow · Salicaceae 4 counties -
Salix cascadensis Cockerell Native SACA6cascade willow · Salicaceae 2 counties -
Salix commutata Bebb Native SACO2undergreen willow · Salicaceae 1 county -
Salix discolor Muhl. Native SADIpussy willow · Salicaceae 1 county -
Salix drummondiana Barratt ex Hook. Native SADRDrummond's willow · Salicaceae 10 counties -
Salix eastwoodiae Cockerell ex A. Heller Native SAEAmountain willow · Salicaceae 2 counties -
Salix eriocephala Michx. Native SAERMissouri River willow · Salicaceae 1 county -
Salix exigua Nutt. Native SAEXnarrowleaf willow · Salicaceae 31 counties - Salix fragilis L. Introduced SAFRcrack willow · Salicaceae 5 counties
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Salix geyeriana Andersson Native SAGE2Geyer willow · Salicaceae 6 counties -
Salix glauca L. Native SAGLgrayleaf willow · Salicaceae 4 counties - Salix glauca L. ssp. glauca Native SAGLGgrayleaf willow · Salicaceae 4 counties
- Salix glauca L. ssp. glauca var. villosa (D. Don ex Hook.) Andersson Native SAGLVgrayleaf willow · Salicaceae 4 counties
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Salix interior Rowlee Native SAIN3sandbar willow · Salicaceae 18 counties -
Salix lemmonii Bebb Native SALELemmon's willow · Salicaceae 1 county -
Salix lucida Muhl. Native SALUshining willow · Salicaceae 12 counties - Salix lucida Muhl. ssp. caudata (Nutt.) A.E. Murray Native SALUCgreenleaf willow · Salicaceae 2 counties
- Salix lucida Muhl. ssp. lasiandra (Benth.) A.E. Murray Native SALULPacific willow · Salicaceae 9 counties
- Salix lucida Muhl. ssp. lucida Native SALUL2shining willow · Salicaceae 1 county
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Salix lutea Nutt. Native SALU2yellow willow · Salicaceae 13 counties -
Salix melanopsis Nutt. Native SAME2dusky willow · Salicaceae 2 counties -
Salix myrtillifolia Andersson Native SAMYblueberry willow · Salicaceae 1 county -
Salix nivalis Hook. Native SANI8snow willow · Salicaceae 7 counties -
Salix pentandra L. Introduced SAPE4laurel willow · Salicaceae 3 counties -
Salix petrophila Rydb. Native SAPE18alpine willow · Salicaceae 2 counties -
Salix planifolia Pursh Native SAPL2diamondleaf willow · Salicaceae 2 counties - Salix planifolia Pursh ssp. planifolia Native SAPLP4diamondleaf willow · Salicaceae 2 counties
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Salix prolixa Andersson Native SAPR3MacKenzie's willow · Salicaceae 7 counties -
Salix pseudomonticola C.R. Ball Native SAPSfalse mountain willow · Salicaceae 11 counties -
Salix rotundifolia Trautv. Native SARO2least willow · Salicaceae 2 counties - Salix rotundifolia Trautv. ssp. dodgeana (Rydb.) Argus Native SARODtimberline willow · Salicaceae 2 counties
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Salix scouleriana Barratt ex Hook. Native SASCScouler's willow · Salicaceae 16 counties -
Salix sitchensis Sanson ex Bong. Native SASI2Sitka willow · Salicaceae 1 county -
Salix tweedyi (Bebb ex Rose) C.R. Ball Native SATWTweedy's willow · Salicaceae 2 counties -
Salix vestita Pursh Native SAVErock willow · Salicaceae 1 county -
Salix wolfii Bebb Native SAWOWolf's willow · Salicaceae 4 counties -
Salsola collina Pall. Introduced SACO8slender Russian thistle · Chenopodiaceae 4 counties -
Salsola tragus L. Introduced SATR12prickly Russian thistle · Chenopodiaceae 51 counties -
Salvia pratensis L. Introduced SAPR2introduced sage · Lamiaceae 2 counties -
Salvia reflexa Hornem. Native SARE3lanceleaf sage · Lamiaceae 4 counties -
Salvia sclarea L. Introduced SASC2Europe sage · Lamiaceae 1 county - Salvia ×sylvestris L. (pro sp.) [nemorosa × pratensis] Introduced SASYwoodland sage · Lamiaceae 18 counties
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Sambucus nigra L. Both SANI4black elderberry · Caprifoliaceae 10 counties - Sambucus nigra L. ssp. canadensis (L.) R. Bolli Native SANIC4American black elderberry · Caprifoliaceae 1 county
- Sambucus nigra L. ssp. cerulea (Raf.) R. Bolli Native SANIC5blue elderberry · Caprifoliaceae 9 counties
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Sambucus racemosa L. Native SARA2red elderberry · Caprifoliaceae 20 counties - Sambucus racemosa L. var. melanocarpa (A. Gray) McMinn Native SARAM4Rocky Mountain elder · Caprifoliaceae 16 counties
- Sambucus racemosa L. var. racemosa Native SARAR3red elderberry · Caprifoliaceae 8 counties
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Sanguisorba annua (Nutt. ex Hook.) Nutt. ex Torr. & A. Gray Native SAAN2prairie burnet · Rosaceae 4 counties -
Sanguisorba minor Scop. Introduced SAMI3small burnet · Rosaceae 10 counties - Sanguisorba minor Scop. ssp. balearica (Bourg. ex Nyman) M. Garm. & C. Navarro Introduced SAMIB2small burnet · Rosaceae 10 counties
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Sanicula graveolens Poepp. ex DC. Native SAGR5northern sanicle · Apiaceae 3 counties -
Sanicula marilandica L. Native SAMA2Maryland sanicle · Apiaceae 11 counties -
Saponaria officinalis L. Introduced SAOF4bouncingbet · Caryophyllaceae 15 counties -
Sarcobatus vermiculatus (Hook.) Torr. Native SAVE4greasewood · Chenopodiaceae 23 counties -
Saxifraga adscendens L. Native SAADwedgeleaf saxifrage · Saxifragaceae 12 counties - Saxifraga adscendens L. ssp. oregonensis (Raf.) Bacig. Native SAADO2small saxifrage · Saxifragaceae 12 counties
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Saxifraga bronchialis L. Native SABR6yellowdot saxifrage · Saxifragaceae 14 counties - Saxifraga bronchialis L. ssp. austromontana (Wiegand) Piper Native SABRA2matted saxifrage · Saxifragaceae 14 counties
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Saxifraga caespitosa L. Native SACA50tufted alpine saxifrage · Saxifragaceae 6 counties - Saxifraga caespitosa L. ssp. monticola (Small) A.E. Porsild Native SACAM2tufted alpine saxifrage · Saxifragaceae 1 county
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Saxifraga cernua L. Native SACE2nodding saxifrage · Saxifragaceae 4 counties -
Saxifraga chrysantha A. Gray Native SACH4goldbloom saxifrage · Saxifragaceae 1 county -
Saxifraga ferruginea Graham Native SAFErussethair saxifrage · Saxifragaceae 3 counties -
Saxifraga flagellaris Willd. ex Sternb. Native SAFL6whiplash saxifrage · Saxifragaceae 1 county - Saxifraga flagellaris Willd. ex Sternb. ssp. crandallii (Gandog.) Hultén Native SAFLCCrandall's saxifrage · Saxifragaceae 1 county
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Saxifraga integrifolia Hook. Native SAIN4wholeleaf saxifrage · Saxifragaceae 4 counties -
Saxifraga lyallii Engl. Native SALY3redstem saxifrage · Saxifragaceae 1 county - Saxifraga lyallii Engl. ssp. lyallii Native SALYLredstem saxifrage · Saxifragaceae 1 county
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Saxifraga mertensiana Bong. Native SAME7wood saxifrage · Saxifragaceae 2 counties -
Saxifraga occidentalis S. Watson Native SAOC4Alberta saxifrage · Saxifragaceae 4 counties -
Saxifraga odontoloma Piper Native SAOD2brook saxifrage · Saxifragaceae 2 counties -
Saxifraga oppositifolia L. Native SAOPpurple mountain saxifrage · Saxifragaceae 5 counties - Saxifraga oppositifolia L. ssp. oppositifolia Native SAOPOpurple mountain saxifrage · Saxifragaceae 5 counties
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Saxifraga oregana Howell Native SAOR2Oregon saxifrage · Saxifragaceae 11 counties -
Saxifraga rhomboidea Greene Native SARH2diamondleaf saxifrage · Saxifragaceae 10 counties -
Saxifraga rivularis L. Native SARI8weak saxifrage · Saxifragaceae 5 counties -
Saxifraga subapetala E.E. Nelson Native SASU6Yellowstone saxifrage · Saxifragaceae 2 counties -
Schedonnardus paniculatus (Nutt.) Trel. Native SCPAtumblegrass · Poaceae 9 counties -
Schedonorus arundinaceus (Schreb.) Dumort., nom. cons. Introduced SCAR7tall fescue · Poaceae 25 counties -
Schedonorus pratensis (Huds.) P. Beauv. Introduced SCPR4meadow fescue · Poaceae 21 counties -
Schizachne purpurascens (Torr.) Swallen Native SCPUfalse melic · Poaceae 3 counties -
Schizachyrium scoparium (Michx.) Nash Native SCSClittle bluestem · Poaceae 4 counties - Schizachyrium scoparium (Michx.) Nash var. scoparium Native SCSCSlittle bluestem · Poaceae 4 counties
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Schoenocrambe linifolia (Nutt.) Greene Native SCLIflaxleaf plainsmustard · Brassicaceae 12 counties -
Schoenoplectus acutus (Muhl. ex Bigelow) Á. Löve & D. Löve Native SCAC3hardstem bulrush · Cyperaceae 16 counties - Schoenoplectus acutus (Muhl. ex Bigelow) Á. Löve & D. Löve var. acutus Native SCACAhardstem bulrush · Cyperaceae 16 counties
- Schoenoplectus acutus (Muhl. ex Bigelow) Á. Löve & D. Löve var. occidentalis (S. Watson) S.G. Sm. Native SCACO2tule · Cyperaceae 2 counties
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Schoenoplectus americanus (Pers.) Volkart ex Schinz & R. Keller Native SCAM6chairmaker's bulrush · Cyperaceae 22 counties -
Schoenoplectus heterochaetus (Chase) Soják Native SCHE5slender bulrush · Cyperaceae 1 county -
Schoenoplectus pungens (Vahl) Palla Native SCPU10common threesquare · Cyperaceae 5 counties - Schoenoplectus pungens (Vahl) Palla var. longispicatus (Britton) S.G. Sm. Native SCPUL4common threesquare · Cyperaceae 3 counties
- Schoenoplectus pungens (Vahl) Palla var. pungens Native SCPUP5common threesquare · Cyperaceae 2 counties
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Schoenoplectus tabernaemontani (C.C. Gmel.) Palla Native SCTA2softstem bulrush · Cyperaceae 27 counties -
Scirpus atrovirens Willd. Native SCAT2green bulrush · Cyperaceae 2 counties -
Scirpus microcarpus J. Presl & C. Presl Native SCMI2panicled bulrush · Cyperaceae 5 counties -
Scirpus nevadensis S. Watson Native SCNENevada bulrush · Cyperaceae 1 county -
Scirpus pallidus (Britton) Fernald Native SCPA8cloaked bulrush · Cyperaceae 3 counties -
Scleranthus annuus L. Introduced SCAN2German knotgrass · Caryophyllaceae 7 counties -
Sclerochloa dura (L.) P. Beauv. Introduced SCDU2common hardgrass · Poaceae 2 counties -
Scolochloa festucacea (Willd.) Link Native SCFEcommon rivergrass · Poaceae 2 counties -
Scorzonera laciniata L. Introduced SCLA6cutleaf vipergrass · Asteraceae 11 counties -
Scrophularia lanceolata Pursh Native SCLAlanceleaf figwort · Scrophulariaceae 8 counties -
Scutellaria galericulata L. Native SCGAmarsh skullcap · Lamiaceae 14 counties -
Secale cereale L. Introduced SECEcereal rye · Poaceae 12 counties -
Securigera varia (L.) Lassen Introduced SEVA4crownvetch · Fabaceae 6 counties -
Sedum acre L. Introduced SEACgoldmoss stonecrop · Crassulaceae 5 counties -
Sedum borschii (R.T. Clausen) R.T. Clausen Native SEBO2Borsch stonecrop · Crassulaceae 2 counties -
Sedum debile S. Watson Native SEDEorpine stonecrop · Crassulaceae 1 county -
Sedum lanceolatum Torr. Native SELAspearleaf stonecrop · Crassulaceae 5 counties -
Sedum stenopetalum Pursh Native SEST2wormleaf stonecrop · Crassulaceae 24 counties - Sedum stenopetalum Pursh ssp. stenopetalum Native SESTS2wormleaf stonecrop · Crassulaceae 24 counties
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Selaginella densa Rydb. Native SEDE2lesser spikemoss · Selaginellaceae 12 counties - Selaginella densa Rydb. var. densa Native SEDEDlesser spikemoss · Selaginellaceae 3 counties
- Selaginella densa Rydb. var. scopulorum (Maxon) R. Tryon Native SEDESRocky Mountain spikemoss · Selaginellaceae 2 counties
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Selaginella selaginoides (L.) P. Beauv. ex Mart. & Schrank Native SESEclub spikemoss · Selaginellaceae 1 county -
Senecio amplectens A. Gray Native SEAMshowy alpine ragwort · Asteraceae 2 counties - Senecio amplectens A. Gray var. holmii (Greene) Harrington Native SEAMHHolm's ragwort · Asteraceae 2 counties
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Senecio crassulus A. Gray Native SECRthickleaf ragwort · Asteraceae 4 counties -
Senecio eremophilus Richardson Native SEER2desert ragwort · Asteraceae 2 counties - Senecio eremophilus Richardson var. eremophilus Native SEEREdesert ragwort · Asteraceae 2 counties
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Senecio fremontii Torr. & A. Gray Native SEFR3dwarf mountain ragwort · Asteraceae 6 counties - Senecio fremontii Torr. & A. Gray var. fremontii Native SEFRFdwarf mountain ragwort · Asteraceae 6 counties
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Senecio hydrophiloides Rydb. Native SEHYtall groundsel · Asteraceae 2 counties -
Senecio hydrophilus Nutt. Native SEHY2water ragwort · Asteraceae 3 counties -
Senecio integerrimus Nutt. Native SEIN2lambstongue ragwort · Asteraceae 37 counties - Senecio integerrimus Nutt. var. exaltatus (Nutt.) Cronquist Native SEINEColumbia ragwort · Asteraceae 4 counties
- Senecio integerrimus Nutt. var. integerrimus Native SEINIlambstongue ragwort · Asteraceae 3 counties
- Senecio integerrimus Nutt. var. scribneri (Rydb.) T.M. Barkley Native SEINSScribner's ragwort · Asteraceae 2 counties
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Senecio jacobaea L. Introduced SEJAstinking willie · Asteraceae 4 counties -
Senecio lugens Richardson Native SELUsmall blacktip ragwort · Asteraceae 3 counties -
Senecio megacephalus Nutt. Native SEMErocky ragwort · Asteraceae 4 counties -
Senecio serra Hook. Native SESE2tall ragwort · Asteraceae 11 counties - Senecio serra Hook. var. admirabilis (Greene) A. Nelson Native SESEAtall ragwort · Asteraceae 1 county
- Senecio serra Hook. var. serra Native SESEStall ragwort · Asteraceae 11 counties
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Senecio sphaerocephalus Greene Native SESP4ballhead ragwort · Asteraceae 6 counties -
Senecio triangularis Hook. Native SETRarrowleaf ragwort · Asteraceae 12 counties -
Senecio vulgaris L. Introduced SEVUold-man-in-the-Spring · Asteraceae 21 counties -
Setaria italica (L.) P. Beauv. Introduced SEITfoxtail millet · Poaceae 1 county -
Setaria verticillata (L.) P. Beauv. Introduced SEVE3hooked bristlegrass · Poaceae 6 counties - Setaria viridis (L.) P. Beauv. Introduced SEVI4green bristlegrass · Poaceae 43 counties
- Setaria viridis (L.) P. Beauv. var. viridis Introduced SEVIVgreen bristlegrass · Poaceae 43 counties
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Shepherdia argentea (Pursh) Nutt. Native SHARsilver buffaloberry · Elaeagnaceae 38 counties -
Shepherdia canadensis (L.) Nutt. Native SHCArusset buffaloberry · Elaeagnaceae 39 counties -
Shoshonea pulvinata Evert & Constance Native SHPUShoshone carrot · Apiaceae 1 county -
Sibbaldia procumbens L. Native SIPRcreeping sibbaldia · Rosaceae 11 counties -
Sidalcea oregana (Nutt. ex Torr. & A. Gray) A. Gray Native SIOROregon checkerbloom · Malvaceae 2 counties - Sidalcea oregana (Nutt. ex Torr. & A. Gray) A. Gray ssp. oregana Native SIOROOregon checkerbloom · Malvaceae 2 counties
- Sidalcea oregana (Nutt. ex Torr. & A. Gray) A. Gray ssp. oregana var. oregana Native SIORO2Oregon checkerbloom · Malvaceae 1 county
- Sidalcea oregana (Nutt. ex Torr. & A. Gray) A. Gray ssp. oregana var. procera C.L. Hitchc. Native SIORP2Oregon checkerbloom · Malvaceae 1 county
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Silene acaulis (L.) Jacq. Native SIACmoss campion · Caryophyllaceae 11 counties - Silene acaulis (L.) Jacq. var. subacaulescens (F.N. Williams) Fernald & H. St. John Native SIACS2moss campion · Caryophyllaceae 2 counties
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Silene antirrhina L. Native SIAN2sleepy silene · Caryophyllaceae 4 counties -
Silene conoidea L. Introduced SICO4weed silene · Caryophyllaceae 4 counties -
Silene csereii Baumg. Introduced SICSBalkan catchfly · Caryophyllaceae 27 counties -
Silene dichotoma Ehrh. Introduced SIDI2forked catchfly · Caryophyllaceae 7 counties -
Silene dioica (L.) Clairville Introduced SIDI4red catchfly · Caryophyllaceae 1 county -
Silene douglasii Hook. Native SIDODouglas's catchfly · Caryophyllaceae 3 counties - Silene douglasii Hook. var. douglasii Native SIDODDouglas's catchfly · Caryophyllaceae 3 counties
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Silene drummondii Hook. Native SIDRDrummond's campion · Caryophyllaceae 6 counties - Silene drummondii Hook. var. drummondii Native SIDRDDrummond's campion · Caryophyllaceae 6 counties
- Silene drummondii Hook. var. striata (Rydb.) Bocquet Native SIDRSDrummond's campion · Caryophyllaceae 3 counties
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Silene kingii (S. Watson) Bocquet Native SIKIKing's campion · Caryophyllaceae 1 county -
Silene latifolia Poir. Introduced SILA21bladder campion · Caryophyllaceae 33 counties - Silene latifolia Poir. ssp. alba (Mill.) Greuter & Burdet Introduced SILAA3bladder campion · Caryophyllaceae 32 counties
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Silene menziesii Hook. Native SIMEMenzies' campion · Caryophyllaceae 16 counties - Silene menziesii Hook. ssp. menziesii Native SIMEMMenzies' campion · Caryophyllaceae 15 counties
- Silene menziesii Hook. ssp. menziesii var. menziesii Native SIMEM2Menzies' campion · Caryophyllaceae 2 counties
- Silene menziesii Hook. ssp. menziesii var. viscosa (Greene) C.L. Hitchc. & Maguire Native SIMEV2Menzies' campion · Caryophyllaceae 1 county
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Silene noctiflora L. Introduced SINOnightflowering silene · Caryophyllaceae 11 counties -
Silene oregana S. Watson Native SIOR3Oregon silene · Caryophyllaceae 3 counties -
Silene parryi (S. Watson) C.L. Hitchc. & Maguire Native SIPA4Parry's silene · Caryophyllaceae 13 counties -
Silene repens Patrin ex Pers. Native SIRE3pink campion · Caryophyllaceae 4 counties - Silene repens Patrin ex Pers. ssp. australis C.L. Hitchc. & Maguire Native SIREApink campion · Caryophyllaceae 4 counties
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Silene scouleri Hook. Native SISC7simple campion · Caryophyllaceae 3 counties - Silene scouleri Hook. ssp. scouleri Native SISCS2simple campion · Caryophyllaceae 3 counties
- Silene scouleri Hook. ssp. scouleri var. scouleri Native SISCS3simple campion · Caryophyllaceae 3 counties
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Silene spaldingii S. Watson Native SISP2Spalding's silene · Caryophyllaceae 1 county -
Silene uralensis (Rupr.) Bocquet Native SIURapetalous catchfly · Caryophyllaceae 3 counties - Silene uralensis (Rupr.) Bocquet ssp. montana (S. Watson) McNeill Native SIURMapetalous catchfly · Caryophyllaceae 3 counties
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Silene vulgaris (Moench) Garcke Introduced SIVUmaidenstears · Caryophyllaceae 29 counties -
Sinapis alba L. Introduced SIAL5white mustard · Brassicaceae 3 counties -
Sinapis arvensis L. Introduced SIAR4charlock mustard · Brassicaceae 29 counties - Sinapis arvensis L. ssp. arvensis Introduced SIARAwild mustard · Brassicaceae 29 counties
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Sisymbrium altissimum L. Introduced SIAL2tall tumblemustard · Brassicaceae 51 counties -
Sisymbrium loeselii L. Introduced SILO3small tumbleweed mustard · Brassicaceae 25 counties -
Sisymbrium officinale (L.) Scop. Introduced SIOFhedgemustard · Brassicaceae 6 counties -
Sisyrinchium idahoense E.P. Bicknell Native SIIDIdaho blue-eyed grass · Iridaceae 2 counties - Sisyrinchium idahoense E.P. Bicknell var. occidentale (E.P. Bicknell) Douglass M. Hend. Native SIIDOIdaho blue-eyed grass · Iridaceae 2 counties
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Sisyrinchium montanum Greene Native SIMO2strict blue-eyed grass · Iridaceae 30 counties - Sisyrinchium montanum Greene var. montanum Native SIMOMstrict blue-eyed grass · Iridaceae 30 counties
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Sium suave Walter Native SISU2hemlock waterparsnip · Apiaceae 11 counties -
Smelowskia calycina (Stephan ex Willd.) C.A. Mey. Native SMCAalpine smelowskia · Brassicaceae 12 counties - Smelowskia calycina (Stephan ex Willd.) C.A. Mey. var. americana (Regel & Herder) Drury & Rollins Native SMCAAAmerican false candytuft · Brassicaceae 12 counties
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Smilax ecirrhata (Engelm. ex Kunth) S. Watson Native SMECupright carrionflower · Smilacaceae 1 county -
Smilax lasioneura Hook. Native SMLA3Blue Ridge carrionflower · Smilacaceae 8 counties -
Solanum dulcamara L. Introduced SODUclimbing nightshade · Solanaceae 34 counties - Solanum dulcamara L. var. dulcamara Introduced SODUDclimbing nightshade · Solanaceae 34 counties
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Solanum physalifolium Rusby Introduced SOPHhoe nightshade · Solanaceae 25 counties -
Solanum ptycanthum Dunal Native SOPT7West Indian nightshade · Solanaceae 9 counties -
Solanum rostratum Dunal Native SORObuffalobur nightshade · Solanaceae 20 counties -
Solanum triflorum Nutt. Native SOTRcutleaf nightshade · Solanaceae 28 counties -
Solidago altissima L. Native SOAL6Canada goldenrod · Asteraceae 1 county -
Solidago canadensis L. Native SOCA6Canada goldenrod · Asteraceae 26 counties - Solidago canadensis L. var. gilvocanescens Rydb. Native SOCAGshorthair goldenrod · Asteraceae 4 counties
- Solidago canadensis L. var. lepida (DC.) Cronquist Native SOCALCanada goldenrod · Asteraceae 2 counties
- Solidago canadensis L. var. salebrosa (Piper) M.E. Jones Native SOCASrough Canada goldenrod · Asteraceae 3 counties
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Solidago gigantea Aiton Native SOGIgiant goldenrod · Asteraceae 36 counties -
Solidago missouriensis Nutt. Native SOMI2Missouri goldenrod · Asteraceae 55 counties - Solidago missouriensis Nutt. var. fasciculata Holz. Native SOMIFMissouri goldenrod · Asteraceae 1 county
- Solidago missouriensis Nutt. var. missouriensis Native SOMIMMissouri goldenrod · Asteraceae 55 counties
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Solidago mollis Bartlett Native SOMOvelvety goldenrod · Asteraceae 16 counties - Solidago mollis Bartlett var. mollis Native SOMOMvelvety goldenrod · Asteraceae 16 counties
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Solidago multiradiata Aiton Native SOMURocky Mountain goldenrod · Asteraceae 14 counties - Solidago multiradiata Aiton var. scopulorum A. Gray Native SOMUSmanyray goldenrod · Asteraceae 14 counties
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Solidago nana Nutt. Native SONAbaby goldenrod · Asteraceae 5 counties -
Solidago nemoralis Aiton Native SONEgray goldenrod · Asteraceae 10 counties - Solidago nemoralis Aiton var. longipetiolata (Mack. & Bush) Palmer & Steyerm. Native SONELgray goldenrod · Asteraceae 9 counties
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Solidago simplex Kunth Native SOSI3Mt. Albert goldenrod · Asteraceae 6 counties - Solidago simplex Kunth ssp. simplex Native SOSISMt. Albert goldenrod · Asteraceae 6 counties
- Solidago simplex Kunth ssp. simplex var. simplex Native SOSIS3Mt. Albert goldenrod · Asteraceae 6 counties
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Solidago velutina DC. Native SOVE6threenerve goldenrod · Asteraceae 2 counties -
Sonchus arvensis L. Introduced SOAR2field sowthistle · Asteraceae 45 counties - Sonchus arvensis L. ssp. uliginosus (M. Bieb.) Nyman Introduced SOARUmoist sowthistle · Asteraceae 17 counties
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Sonchus asper (L.) Hill Introduced SOASspiny sowthistle · Asteraceae 32 counties -
Sonchus oleraceus L. Introduced SOOLcommon sowthistle · Asteraceae 17 counties -
Sorbus aucuparia L. Introduced SOAUEuropean mountain ash · Rosaceae 2 counties -
Sorbus scopulina Greene Native SOSC2Greene's mountain ash · Rosaceae 20 counties - Sorbus scopulina Greene var. scopulina Native SOSCSGreene's mountain ash · Rosaceae 20 counties
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Sorbus sitchensis M. Roem. Native SOSI2western mountain ash · Rosaceae 1 county - Sorbus sitchensis M. Roem. var. sitchensis Native SOSIS2Sitka mountain ash · Rosaceae 1 county
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Sorghum bicolor (L.) Moench Introduced SOBI2sorghum · Poaceae 1 county - Sorghum bicolor (L.) Moench ssp. bicolor Introduced SOBIBgrain sorghum · Poaceae 1 county
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Sorghum halepense (L.) Pers. Introduced SOHAJohnsongrass · Poaceae 3 counties -
Sparganium androcladum (Engelm.) Morong Native SPANbranched bur-reed · Sparganiaceae 1 county -
Sparganium angustifolium Michx. Native SPAN2narrowleaf bur-reed · Sparganiaceae 8 counties -
Sparganium eurycarpum Engelm. Native SPEUbroadfruit bur-reed · Sparganiaceae 3 counties -
Sparganium natans L. Native SPNAsmall bur-reed · Sparganiaceae 2 counties -
Spartina gracilis Trin. Native SPGRalkali cordgrass · Poaceae 11 counties -
Spartina pectinata Bosc ex Link Native SPPEprairie cordgrass · Poaceae 10 counties -
Spergula arvensis L. Introduced SPARcorn spurry · Caryophyllaceae 10 counties -
Spergularia maritima (All.) Chiov. Introduced SPMA10media sandspurry · Caryophyllaceae 2 counties -
Spergularia rubra (L.) J. Presl & C. Presl Introduced SPRUred sandspurry · Caryophyllaceae 17 counties -
Spergularia salina J. Presl & C. Presl Native SPSA5salt sandspurry · Caryophyllaceae 6 counties -
Sphaeralcea coccinea (Nutt.) Rydb. Native SPCOscarlet globemallow · Malvaceae 51 counties - Sphaeralcea coccinea (Nutt.) Rydb. ssp. coccinea Native SPCOCscarlet globemallow · Malvaceae 51 counties
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Sphaeromeria capitata Nutt. Native SPCA8rock tansy · Asteraceae 1 county -
Sphaerophysa salsula (Pall.) DC. Introduced SPSA3alkali swainsonpea · Fabaceae 6 counties -
Sphenopholis intermedia (Rydb.) Rydb. Native SPIN3slender wedgescale · Poaceae 2 counties -
Sphenopholis obtusata (Michx.) Scribn. Native SPOBprairie wedgescale · Poaceae 5 counties -
Spiraea douglasii Hook. Native SPDOrose spirea · Rosaceae 5 counties - Spiraea douglasii Hook. var. menziesii (Hook.) C. Presl Native SPDOMMenzies' spirea · Rosaceae 5 counties
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Spiraea lucida Douglas ex Greene Native SPLU5shinyleaf spirea · Rosaceae 26 counties -
Spiraea splendens Baumann ex K. Koch Native SPSP2rose meadowsweet · Rosaceae 7 counties - Spiraea splendens Baumann ex K. Koch var. splendens Native SPSPSrose meadowsweet · Rosaceae 7 counties
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Spiranthes romanzoffiana Cham. Native SPROhooded lady's tresses · Orchidaceae 2 counties -
Spirodela polyrrhiza (L.) Schleid. Native SPPOcommon duckmeat · Lemnaceae 1 county -
Sporobolus airoides (Torr.) Torr. Native SPAIalkali sacaton · Poaceae 7 counties -
Sporobolus cryptandrus (Torr.) A. Gray Native SPCRsand dropseed · Poaceae 12 counties -
Sporobolus neglectus Nash Native SPNE2puffsheath dropseed · Poaceae 1 county -
Stachys pilosa Nutt. Native STPI6hairy hedgenettle · Lamiaceae 17 counties - Stachys pilosa Nutt. var. pilosa Native STPIP5hairy hedgenettle · Lamiaceae 17 counties
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Stanleya pinnata (Pursh) Britton Native STPIdesert princesplume · Brassicaceae 9 counties - Stanleya pinnata (Pursh) Britton var. pinnata Native STPIPdesert princesplume · Brassicaceae 9 counties
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Stanleya tomentosa Parry Native STTOwoolly princesplume · Brassicaceae 1 county - Stanleya tomentosa Parry var. tomentosa Native STTOTwoolly princesplume · Brassicaceae 1 county
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Stanleya viridiflora Nutt. Native STVIgreen princesplume · Brassicaceae 1 county -
Stellaria americana (Porter ex B.L. Rob.) Standl. Native STAMAmerican chickweed · Caryophyllaceae 4 counties -
Stellaria borealis Bigelow Native STBO3boreal starwort · Caryophyllaceae 1 county - Stellaria borealis Bigelow ssp. borealis Native STBOBboreal starwort · Caryophyllaceae 1 county
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Stellaria calycantha (Ledeb.) Bong. Native STCAnorthern starwort · Caryophyllaceae 8 counties -
Stellaria crassifolia Ehrh. Native STCRfleshy starwort · Caryophyllaceae 3 counties - Stellaria crassifolia Ehrh. var. crassifolia Native STCRCfleshy starwort · Caryophyllaceae 3 counties
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Stellaria crispa Cham. & Schltdl. Native STCR2curled starwort · Caryophyllaceae 7 counties -
Stellaria graminea L. Introduced STGRgrass-like starwort · Caryophyllaceae 3 counties -
Stellaria longifolia Muhl. ex Willd. Native STLOlongleaf starwort · Caryophyllaceae 16 counties - Stellaria longifolia Muhl. ex Willd. var. longifolia Native STLOLlongleaf starwort · Caryophyllaceae 15 counties
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Stellaria longipes Goldie Native STLO2longstalk starwort · Caryophyllaceae 14 counties - Stellaria longipes Goldie ssp. longipes Native STLOL7longstalk starwort · Caryophyllaceae 14 counties
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Stellaria media (L.) Vill. Introduced STME2common chickweed · Caryophyllaceae 54 counties - Stellaria media (L.) Vill. ssp. media Introduced STMEMcommon chickweed · Caryophyllaceae 54 counties
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Stellaria nitens Nutt. Native STNIshiny chickweed · Caryophyllaceae 3 counties -
Stellaria obtusa Engelm. Native STOBRocky Mountain chickweed · Caryophyllaceae 3 counties -
Stellaria umbellata Turcz. ex Kar. & Kir. Native STUMumbrella starwort · Caryophyllaceae 7 counties -
Stenanthium occidentale A. Gray Native STOCwestern featherbells · Liliaceae 6 counties -
Stenotus acaulis (Nutt.) Nutt. Native STACstemless mock goldenweed · Asteraceae 19 counties -
Stenotus armerioides Nutt. Native STAR10thrift mock goldenweed · Asteraceae 13 counties - Stenotus armerioides Nutt. var. armerioides Native STARAthrift mock goldenweed · Asteraceae 13 counties
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Stenotus lanuginosus (A. Gray) Greene Native STLA7woolly mock goldenweed · Asteraceae 3 counties -
Stephanomeria minor (Hook.) Nutt. Native STMI13lesser wirelettuce · Asteraceae 12 counties - Stephanomeria minor (Hook.) Nutt. var. minor Native STMIMnarrowleaf wirelettuce · Asteraceae 12 counties
- Stephanomeria minor (Hook.) Nutt. var. myrioclada (D.C. Eaton) Kartesz Native STMIM2narrowleaf wirelettuce · Asteraceae 1 county
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Stephanomeria runcinata Nutt. Native STRU3desert wirelettuce · Asteraceae 7 counties -
Streptopus amplexifolius (L.) DC. Both STAM2claspleaf twistedstalk · Liliaceae 13 counties - Streptopus amplexifolius (L.) DC. var. chalazatus Fassett Native STAMCtubercle twistedstalk · Liliaceae 2 counties
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Stuckenia filiformis (Pers.) Börner Native STFI6fineleaf pondweed · Potamogetonaceae 6 counties - Stuckenia filiformis (Pers.) Börner ssp. alpina (Blytt) Haynes, D.H. Les & M. Kral Native STFIA2fineleaf pondweed · Potamogetonaceae 6 counties
- Stuckenia filiformis (Pers.) Börner ssp. occidentalis (J.W. Robbins) Haynes, D.H. Les & M. Kral Native STFIOwestern fineleaf pondweed · Potamogetonaceae 1 county
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Stuckenia pectinata (L.) Börner Native STPE15sago pondweed · Potamogetonaceae 21 counties -
Stuckenia vaginata (Turcz.) Holub Native STVA8sheathed pondweed · Potamogetonaceae 1 county -
Suaeda calceoliformis (Hook.) Moq. Native SUCA2Pursh seepweed · Chenopodiaceae 19 counties -
Suaeda moquinii (Torr.) Greene Native SUMOMojave seablite · Chenopodiaceae 9 counties -
Subularia aquatica L. Native SUAQwaterawlwort · Brassicaceae 1 county - Subularia aquatica L. var. americana (G. Mulligan & Calder) B. Boivin Native SUAQA2American waterawlwort · Brassicaceae 1 county
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Suckleya suckleyana (Torr.) Rydb. Native SUSU2poison suckleya · Chenopodiaceae 3 counties -
Suksdorfia violacea A. Gray Native SUVIviolet suksdorfia · Saxifragaceae 2 counties -
Swertia perennis L. Native SWPEfelwort · Gentianaceae 2 counties -
Symphoricarpos albus (L.) S.F. Blake Native SYALcommon snowberry · Caprifoliaceae 29 counties - Symphoricarpos albus (L.) S.F. Blake var. albus Native SYALAcommon snowberry · Caprifoliaceae 2 counties
- Symphoricarpos albus (L.) S.F. Blake var. laevigatus (Fernald) S.F. Blake Native SYALLcommon snowberry · Caprifoliaceae 3 counties
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Symphoricarpos occidentalis Hook. Native SYOCwestern snowberry · Caprifoliaceae 43 counties -
Symphoricarpos oreophilus A. Gray Native SYOR2mountain snowberry · Caprifoliaceae 9 counties - Symphoricarpos oreophilus A. Gray var. utahensis (Rydb.) A. Nelson Native SYORUUtah snowberry · Caprifoliaceae 9 counties
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Symphyotrichum ascendens (Lindl.) G.L. Nesom Native SYAS3western aster · Asteraceae 25 counties -
Symphyotrichum boreale (Torr. & A. Gray) Á. Löve & D. Löve Native SYBO2northern bog aster · Asteraceae 5 counties -
Symphyotrichum campestre (Nutt.) G.L. Nesom Native SYCA3western meadow aster · Asteraceae 9 counties - Symphyotrichum campestre (Nutt.) G.L. Nesom var. campestre Native SYCACwestern meadow aster · Asteraceae 9 counties
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Symphyotrichum ciliatum (Ledeb.) G.L. Nesom Native SYCI2rayless alkali aster · Asteraceae 7 counties -
Symphyotrichum ciliolatum (Lindl.) Á. Löve & D. Löve Native SYCILindley's aster · Asteraceae 6 counties -
Symphyotrichum eatonii (A. Gray) G.L. Nesom Native SYEA2Eaton's aster · Asteraceae 13 counties -
Symphyotrichum ericoides (L.) G.L. Nesom Native SYERwhite heath aster · Asteraceae 4 counties - Symphyotrichum ericoides (L.) G.L. Nesom var. ericoides Native SYEREwhite heath aster · Asteraceae 1 county
- Symphyotrichum ericoides (L.) G.L. Nesom var. pansum (S.F. Blake) G.L. Nesom Native SYERP2manyflowered aster · Asteraceae 2 counties
- Symphyotrichum ericoides (L.) G.L. Nesom var. stricticaule (Torr. & A. Gray) G.L. Nesom Native SYERSwhite heath aster · Asteraceae 1 county
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Symphyotrichum falcatum (Lindl.) G.L. Nesom Native SYFAwhite prairie aster · Asteraceae 40 counties - Symphyotrichum falcatum (Lindl.) G.L. Nesom var. commutatum (Torr. & A. Gray) G.L. Nesom Native SYFACwhite prairie aster · Asteraceae 3 counties
- Symphyotrichum falcatum (Lindl.) G.L. Nesom var. falcatum Native SYFAFwhite prairie aster · Asteraceae 40 counties
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Symphyotrichum foliaceum (Lindl. ex DC.) G.L. Nesom Native SYFO2alpine leafybract aster · Asteraceae 19 counties - Symphyotrichum foliaceum (Lindl. ex DC.) G.L. Nesom var. apricum (A. Gray) G.L. Nesom Native SYFOAalpine leafybract aster · Asteraceae 2 counties
- Symphyotrichum foliaceum (Lindl. ex DC.) G.L. Nesom var. canbyi (A. Gray) G.L. Nesom Native SYFOCCanby's aster · Asteraceae 2 counties
- Symphyotrichum foliaceum (Lindl. ex DC.) G.L. Nesom var. foliaceum Native SYFOFalpine leafybract aster · Asteraceae 18 counties
- Symphyotrichum foliaceum (Lindl. ex DC.) G.L. Nesom var. parryi (D.C. Eaton) G.L. Nesom Native SYFOPParry's aster · Asteraceae 2 counties
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Symphyotrichum frondosum (Nutt.) G.L. Nesom Native SYFR2short-rayed alkali aster · Asteraceae 2 counties -
Symphyotrichum laeve (L.) Á. Löve & D. Löve Native SYLA3smooth blue aster · Asteraceae 19 counties - Symphyotrichum laeve (L.) Á. Löve & D. Löve var. geyeri (A. Gray) G.L. Nesom Native SYLAGGeyer's aster · Asteraceae 19 counties
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Symphyotrichum lanceolatum (Willd.) G.L. Nesom Native SYLA6white panicle aster · Asteraceae 9 counties - Symphyotrichum lanceolatum (Willd.) G.L. Nesom ssp. hesperium (A. Gray) G.L. Nesom Native SYLAHwhite panicle aster · Asteraceae 8 counties
- Symphyotrichum lanceolatum (Willd.) G.L. Nesom ssp. hesperium (A. Gray) G.L. Nesom var. hesperium Native SYLAH6white panicle aster · Asteraceae 8 counties
- Symphyotrichum lanceolatum (Willd.) G.L. Nesom ssp. lanceolatum Native SYLAL6white panicle aster · Asteraceae 1 county
- Symphyotrichum lanceolatum (Willd.) G.L. Nesom ssp. lanceolatum var. lanceolatum Native SYLAL4white panicle aster · Asteraceae 1 county
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Symphyotrichum novae-angliae (L.) G.L. Nesom Native SYNO2New England aster · Asteraceae 2 counties -
Symphyotrichum oblongifolium (Nutt.) G.L. Nesom Native SYOBaromatic aster · Asteraceae 3 counties -
Symphyotrichum spathulatum (Lindl.) G.L. Nesom Native SYSPwestern mountain aster · Asteraceae 13 counties - Symphyotrichum spathulatum (Lindl.) G.L. Nesom var. spathulatum Native SYSPSwestern mountain aster · Asteraceae 13 counties
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Symphyotrichum subspicatum (Nees) G.L. Nesom Native SYSU4Douglas aster · Asteraceae 5 counties - Symphyotrichum subspicatum (Nees) G.L. Nesom var. subspicatum Native SYSUSDouglas aster · Asteraceae 5 counties
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Symphytum officinale L. Introduced SYOFcommon comfrey · Boraginaceae 6 counties -
Synthyris canbyi Pennell Native SYCA2Mission Mountain kittentails · Scrophulariaceae 1 county -
Synthyris pinnatifida S. Watson Native SYPIfeatherleaf kittentails · Scrophulariaceae 6 counties - Synthyris pinnatifida S. Watson var. pinnatifida Native SYPIPfeatherleaf kittentails · Scrophulariaceae 1 county
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Tamarix chinensis Lour. Introduced TACH2five-stamen tamarisk · Tamaricaceae 1 county -
Tamarix ramosissima Ledeb. Introduced TARAsaltcedar · Tamaricaceae 1 county -
Tanacetum balsamita L. Introduced TABAcostmary · Asteraceae 6 counties -
Tanacetum parthenium (L.) Sch. Bip. Introduced TAPA6feverfew · Asteraceae 4 counties -
Tanacetum vulgare L. Introduced TAVUcommon tansy · Asteraceae 36 counties -
Taraxacum eriophorum Rydb. Native TAER2woolbearing dandelion · Asteraceae 1 county -
Taraxacum laevigatum (Willd.) DC. Introduced TALA2rock dandelion · Asteraceae 31 counties -
Taraxacum lyratum (Ledeb.) DC. Native TALYharp dandelion · Asteraceae 3 counties -
Taraxacum officinale F.H. Wigg. Both TAOFcommon dandelion · Asteraceae 53 counties - Taraxacum officinale F.H. Wigg. ssp. ceratophorum (Ledeb.) Schinz ex Thell. Native TAOFCcommon dandelion · Asteraceae 5 counties
- Taraxacum officinale F.H. Wigg. ssp. officinale Introduced TAOFOcommon dandelion · Asteraceae 1 county
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Telesonix heucheriformis Rydb. Native TEHE5alumroot brookfoam · Saxifragaceae 2 counties -
Tephroseris lindstroemii (Ostenf.) Á. Löve & D. Löve Native TELI6fuscate groundsel · Asteraceae 3 counties -
Tetradymia canescens DC. Native TECA2spineless horsebrush · Asteraceae 13 counties -
Tetradymia spinosa Hook. & Arn. Native TESP2shortspine horsebrush · Asteraceae 2 counties -
Tetraneuris acaulis (Pursh) Greene Native TEACstemless four-nerve daisy · Asteraceae 36 counties - Tetraneuris acaulis (Pursh) Greene var. acaulis Native TEACA2stemless four-nerve daisy · Asteraceae 36 counties
- Tetraneuris acaulis (Pursh) Greene var. caespitosa A. Nelson Native TEACCcaespitose four-nerve daisy · Asteraceae 1 county
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Tetraneuris grandiflora (Torr. & A. Gray ex A. Gray) K.F. Parker Native TEGR3graylocks four-nerve daisy · Asteraceae 7 counties -
Teucrium canadense L. Native TECA3Canada germander · Lamiaceae 1 county - Teucrium canadense L. var. occidentale (A. Gray) E.M. McClint. & Epling Native TECAOwestern germander · Lamiaceae 1 county
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Thalictrum alpinum L. Native THALalpine meadow-rue · Ranunculaceae 2 counties -
Thalictrum dasycarpum Fisch. & Avé-Lall. Native THDApurple meadow-rue · Ranunculaceae 12 counties -
Thalictrum fendleri Engelm. ex A. Gray Native THFEFendler's meadow-rue · Ranunculaceae 2 counties - Thalictrum fendleri Engelm. ex A. Gray var. fendleri Native THFEFFendler's meadow-rue · Ranunculaceae 2 counties
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Thalictrum occidentale A. Gray Native THOCwestern meadow-rue · Ranunculaceae 18 counties - Thalictrum occidentale A. Gray var. occidentale Native THOCO2western meadow-rue · Ranunculaceae 16 counties
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Thalictrum sparsiflorum Turcz. ex Fisch. & C.A. Mey. Native THSPfewflower meadow-rue · Ranunculaceae 5 counties - Thalictrum sparsiflorum Turcz. ex Fisch. & C.A. Mey. var. saximontanum B. Boivin Native THSPSfewflower meadow-rue · Ranunculaceae 5 counties
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Thalictrum venulosum Trel. Native THVEveiny meadow-rue · Ranunculaceae 22 counties -
Thelesperma subnudum A. Gray Native THSUNavajo tea · Asteraceae 17 counties - Thelesperma subnudum A. Gray var. marginatum (Rydb.) T.E. Melchert ex Cronquist Native THSUMNavajo tea · Asteraceae 17 counties
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Thellungiella salsuginea (Pall.) O.E. Schulz Native THSAsaltwater cress · Brassicaceae 4 counties -
Thelypodium integrifolium (Nutt.) Endl. ex Walp. Native THINentireleaved thelypody · Brassicaceae 6 counties - Thelypodium integrifolium (Nutt.) Endl. ex Walp. ssp. integrifolium Native THINIentireleaved thelypody · Brassicaceae 6 counties
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Thelypodium paniculatum A. Nelson Native THPA6northwestern thelypody · Brassicaceae 1 county -
Thelypodium sagittatum (Nutt. ex Torr. & A. Gray) Endl. ex Walp. Native THSA2arrow thelypody · Brassicaceae 1 county - Thelypodium sagittatum (Nutt. ex Torr. & A. Gray) Endl. ex Walp. ssp. sagittatum Native THSASarrow thelypody · Brassicaceae 1 county
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Thermopsis montana Nutt. Native THMO6mountain goldenbanner · Fabaceae 14 counties - Thermopsis montana Nutt. var. montana Native THMOM3mountain goldenbanner · Fabaceae 14 counties
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Thermopsis rhombifolia (Nutt. ex Pursh) Nutt. ex Richardson Native THRHprairie thermopsis · Fabaceae 41 counties -
Thinopyrum intermedium (Host) Barkworth & D.R. Dewey Introduced THIN6intermediate wheatgrass · Poaceae 28 counties -
Thinopyrum ponticum (Podp.) Z.-W. Liu & R.-C. Wang Introduced THPO7tall wheatgrass · Poaceae 12 counties -
Thlaspi arvense L. Introduced THAR5field pennycress · Brassicaceae 56 counties -
Thuja plicata Donn ex D. Don Native THPLwestern redcedar · Cupressaceae 5 counties -
Thymus praecox Opiz Introduced THPRmother of thyme · Lamiaceae 2 counties - Thymus praecox Opiz ssp. arcticus (Durand) Jalas Introduced THPRAcreeping thyme · Lamiaceae 2 counties
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Tiarella trifoliata L. Native TITRthreeleaf foamflower · Saxifragaceae 7 counties - Tiarella trifoliata L. var. unifoliata (Hook.) Kurtz Native TITRUoneleaf foamflower · Saxifragaceae 7 counties
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Tonestus lyallii (A. Gray) A. Nelson Native TOLYLyall's goldenweed · Asteraceae 4 counties -
Torreyochloa pallida (Torr.) Church Native TOPA6pale false mannagrass · Poaceae 2 counties - Torreyochloa pallida (Torr.) Church var. fernaldii (Hitchc.) Dore ex Koyama & Kawano Native TOPAFFernald's false mannagrass · Poaceae 1 county
- Torreyochloa pallida (Torr.) Church var. pauciflora (J. Presl) J.I. Davis Native TOPAP3pale false mannagrass · Poaceae 2 counties
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Townsendia alpigena Piper Native TOALWyoming Townsend daisy · Asteraceae 3 counties - Townsendia alpigena Piper var. alpigena Native TOALAWyoming Townsend daisy · Asteraceae 3 counties
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Townsendia condensata Parry ex A. Gray Native TOCO2cushion Townsend daisy · Asteraceae 1 county - Townsendia condensata Parry ex A. Gray var. anomala (Heiser) Dorn Native TOCOAcushion Townsend daisy · Asteraceae 1 county
- Townsendia condensata Parry ex A. Gray var. condensata Native TOCOCcushion Townsend daisy · Asteraceae 1 county
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Townsendia exscapa (Richardson) Porter Native TOEX2stemless Townsend daisy · Asteraceae 4 counties -
Townsendia florifer (Hook.) A. Gray Native TOFL5showy Townsend daisy · Asteraceae 1 county -
Townsendia hookeri Beaman Native TOHOHooker's Townsend daisy · Asteraceae 22 counties -
Townsendia leptotes (A. Gray) Osterh. Native TOLEcommon Townsend daisy · Asteraceae 1 county -
Townsendia nuttallii Dorn Native TONUNuttall's Townsend daisy · Asteraceae 2 counties -
Townsendia parryi D.C. Eaton Native TOPA2Parry's Townsend daisy · Asteraceae 21 counties -
Townsendia spathulata Nutt. Native TOSPsword Townsend daisy · Asteraceae 1 county -
Toxicodendron rydbergii (Small ex Rydb.) Greene Native TORYwestern poison ivy · Anacardiaceae 16 counties -
Tradescantia bracteata Small Native TRBRlongbract spiderwort · Commelinaceae 2 counties -
Tradescantia occidentalis (Britton) Smyth Native TROCprairie spiderwort · Commelinaceae 11 counties - Tradescantia occidentalis (Britton) Smyth var. occidentalis Native TROCOprairie spiderwort · Commelinaceae 11 counties
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Tragopogon dubius Scop. Introduced TRDUyellow salsify · Asteraceae 56 counties -
Tragopogon mirus Ownbey Native TRMI7remarkable goatsbeard · Asteraceae 2 counties - Tragopogon miscellus Ownbey Introduced TRMI8Moscow salsify · Asteraceae 3 counties
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Tragopogon porrifolius L. Introduced TRPOsalsify · Asteraceae 10 counties - Tragopogon pratensis L. Introduced TRPRJack-go-to-bed-at-noon · Asteraceae 22 counties
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Trautvetteria caroliniensis (Walter) Vail Native TRCACarolina bugbane · Ranunculaceae 1 county - Trautvetteria caroliniensis (Walter) Vail var. occidentalis (A. Gray) C.L. Hitchc. Native TRCAOwestern bugbane · Ranunculaceae 1 county
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Triantha occidentalis (S. Watson) Gates Native TROC7western false asphodel · Liliaceae 6 counties - Triantha occidentalis (S. Watson) Gates ssp. montana (C.L. Hitchc.) Packer Native TROCM2sticky tofieldia · Liliaceae 6 counties
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Tribulus terrestris L. Introduced TRTEpuncturevine · Zygophyllaceae 7 counties -
Trichophorum alpinum (L.) Pers. Native TRAL7alpine bulrush · Cyperaceae 1 county -
Trichophorum cespitosum (L.) Hartm. Native TRCE3tufted bulrush · Cyperaceae 1 county -
Trichophorum pumilum (Vahl) Schinz & Thell. Native TRPU18Rolland's bulrush · Cyperaceae 1 county -
Trifolium arvense L. Introduced TRAR4rabbitfoot clover · Fabaceae 6 counties -
Trifolium aureum Pollich Introduced TRAU2golden clover · Fabaceae 15 counties -
Trifolium campestre Schreb. Introduced TRCA5field clover · Fabaceae 7 counties -
Trifolium dasyphyllum Torr. & A. Gray Native TRDA2alpine clover · Fabaceae 4 counties - Trifolium dasyphyllum Torr. & A. Gray ssp. dasyphyllum Native TRDADalpine clover · Fabaceae 1 county
- Trifolium dasyphyllum Torr. & A. Gray ssp. uintense (Rydb.) J.M. Gillett Native TRDAUUinta clover · Fabaceae 4 counties
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Trifolium dubium Sibth. Introduced TRDU2suckling clover · Fabaceae 14 counties -
Trifolium fragiferum L. Introduced TRFR2strawberry clover · Fabaceae 6 counties -
Trifolium gymnocarpon Nutt. Native TRGYhollyleaf clover · Fabaceae 1 county - Trifolium gymnocarpon Nutt. ssp. plummerae (S. Watson) J.M. Gillett Native TRGYP2Plummer's clover · Fabaceae 1 county
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Trifolium haydenii Porter Native TRHAHayden's clover · Fabaceae 6 counties -
Trifolium hybridum L. Introduced TRHYalsike clover · Fabaceae 27 counties -
Trifolium latifolium (Hook.) Greene Native TRLA8twin clover · Fabaceae 1 county -
Trifolium longipes Nutt. Native TRLOlongstalk clover · Fabaceae 19 counties - Trifolium longipes Nutt. ssp. reflexum (A. Nelson) J.M. Gillett Native TRLOR3droopflower clover · Fabaceae 19 counties
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Trifolium nanum Torr. Native TRNA2dwarf clover · Fabaceae 3 counties -
Trifolium parryi A. Gray Native TRPA5Parry's clover · Fabaceae 4 counties - Trifolium parryi A. Gray ssp. montanense (Rydb.) J.M. Gillett Native TRPAMParry's clover · Fabaceae 4 counties
- Trifolium parryi A. Gray ssp. parryi Native TRPAPParry's clover · Fabaceae 1 county
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Trifolium pratense L. Introduced TRPR2red clover · Fabaceae 41 counties -
Trifolium repens L. Introduced TRRE3white clover · Fabaceae 44 counties -
Trifolium variegatum Nutt. Native TRVAwhitetip clover · Fabaceae 1 county -
Triglochin maritima L. Native TRMA20seaside arrowgrass · Juncaginaceae 20 counties -
Triglochin palustris L. Native TRPA28marsh arrowgrass · Juncaginaceae 11 counties -
Trillium ovatum Pursh Native TROV2Pacific trillium · Liliaceae 9 counties - Trillium ovatum Pursh ssp. ovatum Native TROVO2Pacific trillium · Liliaceae 9 counties
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Triodanis leptocarpa (Nutt.) Nieuwl. Native TRLE3slimpod Venus' looking-glass · Campanulaceae 9 counties -
Triodanis perfoliata (L.) Nieuwl. Native TRPE4clasping Venus' looking-glass · Campanulaceae 5 counties -
Tripleurospermum perforatum (Mérat) M. Lainz Introduced TRPE21scentless false mayweed · Asteraceae 4 counties -
Tripterocalyx micranthus (Torr.) Hook. Native TRMI6smallflower sandverbena · Nyctaginaceae 6 counties -
Trisetum spicatum (L.) K. Richt. Native TRSP2spike trisetum · Poaceae 2 counties -
Trisetum wolfii Vasey Native TRWO3Wolf's trisetum · Poaceae 2 counties -
Triteleia grandiflora Lindl. Native TRGR7largeflower triteleia · Liliaceae 9 counties - Triteleia grandiflora Lindl. var. grandiflora Native TRGRG2largeflower triteleia · Liliaceae 9 counties
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Triticum aestivum L. Introduced TRAEcommon wheat · Poaceae 12 counties -
Trollius laxus Salisb. Native TRLA14American globeflower · Ranunculaceae 13 counties - Trollius laxus Salisb. ssp. albiflorus (A. Gray) Á. Löve & D. Löve & Kapoor Native TRLAA2American globeflower · Ranunculaceae 13 counties
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Tsuga heterophylla (Raf.) Sarg. Native TSHEwestern hemlock · Pinaceae 2 counties -
Tsuga mertensiana (Bong.) Carrière Native TSMEmountain hemlock · Pinaceae 2 counties -
Typha angustifolia L. Both TYANnarrowleaf cattail · Typhaceae 4 counties -
Typha latifolia L. Native TYLAbroadleaf cattail · Typhaceae 23 counties - Typha ×glauca Godr. (pro sp.) [angustifolia or domingensis × latifolia] Native TYGLhybrid cattail · Typhaceae 1 county
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Ulmus americana L. Native ULAMAmerican elm · Ulmaceae 14 counties -
Ulmus pumila L. Introduced ULPUSiberian elm · Ulmaceae 5 counties -
Urtica dioica L. Both URDIstinging nettle · Urticaceae 55 counties - Urtica dioica L. ssp. gracilis (Aiton) Seland. Native URDIGCalifornia nettle · Urticaceae 14 counties
- Urtica dioica L. ssp. holosericea (Nutt.) Thorne Native URDIHstinging nettle · Urticaceae 1 county
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Utricularia macrorhiza Leconte Native UTMAcommon bladderwort · Lentibulariaceae 11 counties -
Utricularia minor L. Native UTMIlesser bladderwort · Lentibulariaceae 2 counties -
Vaccaria hispanica (Mill.) Rauschert Introduced VAHI2cow soapwort · Caryophyllaceae 42 counties -
Vaccinium cespitosum Michx. Native VACEdwarf bilberry · Ericaceae 8 counties -
Vaccinium membranaceum Douglas ex Torr. Native VAMEthinleaf huckleberry · Ericaceae 16 counties -
Vaccinium myrtilloides Michx. Native VAMYvelvetleaf huckleberry · Ericaceae 2 counties -
Vaccinium myrtillus L. Native VAMY2whortleberry · Ericaceae 8 counties -
Vaccinium scoparium Leiberg ex Coville Native VASCgrouse whortleberry · Ericaceae 18 counties -
Vaccinium uliginosum L. Native VAULbog blueberry · Ericaceae 3 counties -
Vahlodea atropurpurea (Wahlenb.) Fr. ex Hartm. Native VAAT2mountain hairgrass · Poaceae 2 counties -
Valeriana acutiloba Rydb. Native VAACsharpleaf valerian · Valerianaceae 2 counties - Valeriana acutiloba Rydb. var. pubicarpa (Rydb.) Cronquist Native VAACPhairyfruit valerian · Valerianaceae 2 counties
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Valeriana dioica L. Native VADImarsh valerian · Valerianaceae 18 counties - Valeriana dioica L. var. sylvatica S. Watson Native VADISwoods valerian · Valerianaceae 18 counties
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Valeriana edulis Nutt. ex Torr. & A. Gray Native VAEDtobacco root · Valerianaceae 14 counties - Valeriana edulis Nutt. ex Torr. & A. Gray var. edulis Native VAEDEtobacco root · Valerianaceae 14 counties
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Valeriana occidentalis A. Heller Native VAOC2western valerian · Valerianaceae 7 counties -
Valeriana officinalis L. Introduced VAOFgarden valerian · Valerianaceae 3 counties -
Valeriana sitchensis Bong. Native VASISitka valerian · Valerianaceae 11 counties -
Valerianella locusta (L.) Lat. Introduced VALOLewiston cornsalad · Valerianaceae 1 county -
Veratrum californicum Durand Native VECA2California false hellebore · Liliaceae 7 counties - Veratrum californicum Durand var. californicum Native VECAC2California false hellebore · Liliaceae 7 counties
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Verbascum blattaria L. Introduced VEBLmoth mullein · Scrophulariaceae 9 counties -
Verbascum thapsus L. Introduced VETHcommon mullein · Scrophulariaceae 37 counties -
Verbena bracteata Cav. ex Lag. & Rodr. Native VEBRbigbract verbena · Verbenaceae 42 counties -
Verbena hastata L. Native VEHA2swamp verbena · Verbenaceae 9 counties - Verbena hastata L. var. scabra Moldenke Native VEHASswamp verbena · Verbenaceae 9 counties
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Verbena stricta Vent. Native VESThoary verbena · Verbenaceae 2 counties -
Vernonia fasciculata Michx. Native VEFA2prairie ironweed · Asteraceae 1 county - Vernonia fasciculata Michx. ssp. corymbosa (Schwein. ex Keating) S.B. Jones Native VEFACprairie ironweed · Asteraceae 1 county
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Veronica americana Schwein. ex Benth. Native VEAM2American speedwell · Scrophulariaceae 18 counties -
Veronica anagallis-aquatica L. Native VEAN2water speedwell · Scrophulariaceae 18 counties -
Veronica arvensis L. Introduced VEARcorn speedwell · Scrophulariaceae 9 counties -
Veronica biloba L. Introduced VEBI2twolobe speedwell · Scrophulariaceae 9 counties -
Veronica chamaedrys L. Introduced VECHgermander speedwell · Scrophulariaceae 3 counties -
Veronica officinalis L. Introduced VEOF2common gypsyweed · Scrophulariaceae 5 counties - Veronica officinalis L. var. officinalis Introduced VEOFOcommon gypsyweed · Scrophulariaceae 5 counties
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Veronica peregrina L. Native VEPE2neckweed · Scrophulariaceae 13 counties - Veronica peregrina L. ssp. xalapensis (Kunth) Pennell Native VEPEX2hairy purslane speedwell · Scrophulariaceae 13 counties
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Veronica persica Poir. Introduced VEPE3birdeye speedwell · Scrophulariaceae 8 counties -
Veronica scutellata L. Native VESC2skullcap speedwell · Scrophulariaceae 6 counties -
Veronica serpyllifolia L. Both VESEthymeleaf speedwell · Scrophulariaceae 23 counties - Veronica serpyllifolia L. ssp. humifusa (Dicks.) Syme Native VESEH2brightblue speedwell · Scrophulariaceae 2 counties
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Veronica verna L. Introduced VEVEspring speedwell · Scrophulariaceae 7 counties -
Veronica wormskjoldii Roem. & Schult. Native VEWO2American alpine speedwell · Scrophulariaceae 13 counties - Veronica wormskjoldii Roem. & Schult. var. wormskjoldii Native VEWOWAmerican alpine speedwell · Scrophulariaceae 13 counties
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Viburnum edule (Michx.) Raf. Native VIEDsquashberry · Caprifoliaceae 3 counties -
Viburnum lantana L. Introduced VILAwayfaringtree · Caprifoliaceae 1 county -
Viburnum opulus L. Both VIOPEuropean cranberrybush · Caprifoliaceae 1 county - Viburnum opulus L. var. americanum Aiton Native VIOPA2American cranberrybush · Caprifoliaceae 1 county
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Vicia americana Muhl. ex Willd. Native VIAMAmerican vetch · Fabaceae 54 counties - Vicia americana Muhl. ex Willd. ssp. americana Native VIAMA3American vetch · Fabaceae 11 counties
- Vicia americana Muhl. ex Willd. ssp. minor (Hook.) C.R. Gunn Native VIAMM3mat vetch · Fabaceae 13 counties
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Vicia cracca L. Introduced VICRbird vetch · Fabaceae 9 counties - Vicia cracca L. ssp. cracca Introduced VICRCbird vetch · Fabaceae 9 counties
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Vicia sativa L. Introduced VISAgarden vetch · Fabaceae 10 counties - Vicia sativa L. ssp. nigra (L.) Ehrh. Introduced VISAN2garden vetch · Fabaceae 10 counties
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Vicia tetrasperma (L.) Schreb. Introduced VITElentil vetch · Fabaceae 2 counties -
Vicia villosa Roth Introduced VIVIwinter vetch · Fabaceae 9 counties -
Viola adunca Sm. Native VIADhookedspur violet · Violaceae 28 counties - Viola adunca Sm. var. adunca Native VIADAhookedspur violet · Violaceae 28 counties
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Viola arvensis Murray Introduced VIAREuropean field pansy · Violaceae 5 counties -
Viola canadensis L. Native VICA4Canadian white violet · Violaceae 26 counties - Viola canadensis L. var. rugulosa (Greene) C.L. Hitchc. Native VICARcreepingroot violet · Violaceae 24 counties
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Viola glabella Nutt. Native VIGLpioneer violet · Violaceae 6 counties -
Viola macloskeyi Lloyd Native VIMA2small white violet · Violaceae 5 counties - Viola macloskeyi Lloyd ssp. pallens (Banks ex Ging) M.S. Baker Native VIMAP3smooth white violet · Violaceae 5 counties
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Viola nephrophylla Greene Native VINEnorthern bog violet · Violaceae 14 counties -
Viola nuttallii Pursh Native VINU2Nuttall's violet · Violaceae 42 counties -
Viola orbiculata Geyer ex Holz. Native VIORdarkwoods violet · Violaceae 19 counties -
Viola palustris L. Native VIPA4marsh violet · Violaceae 5 counties -
Viola praemorsa Douglas ex Lindl. Native VIPR3canary violet · Violaceae 2 counties -
Viola purpurea Kellogg Native VIPU4goosefoot violet · Violaceae 3 counties - Viola purpurea Kellogg ssp. venosa (S. Watson) M.S. Baker & J.C. Clausen Native VIPUV2goosefoot violet · Violaceae 3 counties
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Viola renifolia A. Gray Native VIRE2white violet · Violaceae 2 counties -
Viola septentrionalis Greene Native VISE5northern woodland violet · Violaceae 13 counties -
Viola vallicola A. Nelson Native VIVAsagebrush violet · Violaceae 3 counties - Viola vallicola A. Nelson var. vallicola Native VIVAVsagebrush violet · Violaceae 1 county
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Vitis riparia Michx. Native VIRIriverbank grape · Vitaceae 4 counties -
Vulpia bromoides (L.) Gray Introduced VUBRbrome fescue · Poaceae 1 county -
Vulpia octoflora (Walter) Rydb. Native VUOCsixweeks fescue · Poaceae 12 counties - Vulpia octoflora (Walter) Rydb. var. glauca (Nutt.) Fernald Native VUOCGsixweeks fescue · Poaceae 2 counties
- Vulpia octoflora (Walter) Rydb. var. octoflora Native VUOCOsixweeks fescue · Poaceae 12 counties
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Woodsia oregana D.C. Eaton Native WOOROregon cliff fern · Dryopteridaceae 7 counties - Woodsia oregana D.C. Eaton ssp. cathcartiana (B.L. Rob.) Windham Native WOORC2Oregon cliff fern · Dryopteridaceae 3 counties
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Woodsia scopulina D.C. Eaton Native WOSCRocky Mountain woodsia · Dryopteridaceae 3 counties - Woodsia scopulina D.C. Eaton ssp. scopulina Native WOSCSRocky Mountain woodsia · Dryopteridaceae 1 county
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Wyethia amplexicaulis (Nutt.) Nutt. Native WYAMmule-ears · Asteraceae 4 counties -
Wyethia helianthoides Nutt. Native WYHE2sunflower mule-ears · Asteraceae 3 counties -
Xanthium spinosum L. Introduced XASP2spiny cocklebur · Asteraceae 2 counties -
Xanthium strumarium L. Native XASTrough cocklebur · Asteraceae 34 counties - Xanthium strumarium L. var. canadense (Mill.) Torr. & A. Gray Native XASTCCanada cocklebur · Asteraceae 34 counties
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Xerophyllum tenax (Pursh) Nutt. Native XETEcommon beargrass · Liliaceae 1 county -
Xylorhiza glabriuscula Nutt. Native XYGLsmooth woodyaster · Asteraceae 1 county -
Yucca glauca Nutt. Native YUGLsoapweed yucca · Agavaceae 21 counties - Yucca glauca Nutt. var. glauca Native YUGLG2soapweed yucca · Agavaceae 20 counties
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Zannichellia palustris L. Native ZAPAhorned pondweed · Zannichelliaceae 9 counties -
Zigadenus elegans Pursh Native ZIEL2mountain deathcamas · Liliaceae 22 counties - Zigadenus elegans Pursh ssp. elegans Native ZIELEmountain deathcamas · Liliaceae 22 counties
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Zigadenus paniculatus (Nutt.) S. Watson Native ZIPA2foothill deathcamas · Liliaceae 3 counties -
Zigadenus venenosus S. Watson Native ZIVEmeadow deathcamas · Liliaceae 34 counties - Zigadenus venenosus S. Watson var. gramineus (Rydb.) Walsh ex M. Peck Native ZIVEGgrassy deathcamas · Liliaceae 34 counties
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Zizia aptera (A. Gray) Fernald Native ZIAPmeadow zizia · Apiaceae 15 counties -
Zizia aurea (L.) W.D.J. Koch Native ZIAUgolden zizia · Apiaceae 1 county -
Zygophyllum fabago L. Introduced ZYFASyrian beancaper · Zygophyllaceae 3 counties - ×Elyhordeum macounii (Vasey) Barkworth & D.R. Dewey [Elymus trachycaulus × Hordeum jubatum] Native ELMA8Macoun's barley · Poaceae 6 counties
- ×Pseudelymus saxicola (Scribn. & J.G. Sm.) Barkworth & D.R. Dewey [Elymus elymoides × Pseudoroegneria spicata] Native PSSA2foxtail wheatgrass · Poaceae 1 county