Index / Search / Lomatium cous
§1 Plant — species · Apiaceae
Lomatium cous (S. Watson) J.M. Coult. & Rose
vernacular cous biscuitroot
§2Habit & range
Habit and range
- Growth habit
- Forb/herb
- Duration
- Perennial
- Group
- Dicot
- Family
- Apiaceae Lindl.
- Genus
- Lomatium
§2a
Native status, by region
- CAN Canada Native
- L48 Lower 48 States Native
§3Cultivation specs · USDA
Recorded by the USDA Plant Materials Program.
§3a
Tolerances
- Drought
- High
- Shade
- High
- Moisture use
- Low
- Fire
- Medium
- Salinity
- Low
- Anaerobic
- None
- CaCO₃
- Medium
- Hedging
- None
§3b
Climate & soil
- Cold tolerance
- -28 °F minimum
- Frost-free days
- 105 min.
- Precipitation
- 8–16 in/yr
- pH range
- 6–8.5
- Root depth
- 10 in min.
- Fertility need
- Low
- Soil texture
- coarse, medium
§3c
Form & growth
- Growth form
- Rhizomatous
- Growth rate
- Rapid
- Lifespan
- Short
- Mature height
- 0.8 ft
- Foliage texture
- Fine
- Foliage colour
- Green
- Porosity (summer)
- Porous
- Porosity (winter)
- Porous
- Flower colour
- Yellow
- Fruit colour
- Brown
- Fire resistant
- No
- N fixation
- None
- Toxicity
- None
§3d
Reproduction
- Bloom period
- Early Spring
- Seed abundance
- Medium
- Seed begins
- Spring
- Seed ends
- Spring
- Spread rate
- Slow
- Stratify
- No
- Seeds / lb
- 100,000
- Propagation
- seed, tubers
§3e
Use & availability
- Commercial availability
- No Known Source
- Nursery stock
- No
- Browse palatability
- Medium
- Graze palatability
- Medium
- Palatable, human
- Yes
- Protein potential
- Low
- Lumber
- No
- Christmas tree
- No
§4Montana distribution
Recorded in 21 of 56 Montana counties.
Native · 21 counties
- Beaverhead 30001
- Broadwater 30007
- Carbon 30009
- Cascade 30013
- Chouteau 30015
- Gallatin 30031
- Glacier 30035
- Judith Basin 30045
- Lewis and Clark 30049
- Madison 30057
- Meagher 30059
- Missoula 30063
- Park 30067
- Phillips 30071
- Powell 30077
- Silver Bow 30093
- Stillwater 30095
- Sweet Grass 30097
- Teton 30099
- Valley 30105
- Wibaux 30109
§5Sources & provenance
USDA PLANTS
Symbol, taxonomy, distribution, cultivation specs, native status. Public domain.
plants.usda.gov/LOCO4 ↗GBIF Backbone
Canonical taxonomic identity, synonym resolution, cross-refs. CC0.
gbif.org/species/3034320 ↗Record version
Cached and built locally. Source version on this record:
usda-plants-mt-2026-05-25
fetched 2026-05-25T16:28:53Z