Index / Search / Conium maculatum
§1 Plant — species · Apiaceae
Conium maculatum L.
vernacular poison hemlock
§2Habit & range
Habit and range
- Growth habit
- Forb/herb
- Duration
- Biennial
- Group
- Dicot
- Family
- Apiaceae Lindl.
- Genus
- Conium
§2a
Native status, by region
- CAN Canada Introduced
- L48 Lower 48 States Introduced
§3Cultivation
No cultivation specs.
USDA has not characterised this taxon. Roughly four out of five plants in the database lack the detailed cultivation record present here — typically because they have not been the focus of NRCS Plant Materials work. Range and distribution data are unaffected.
§4Montana distribution
Recorded in 33 of 56 Montana counties.
Introduced · 33 counties
- Beaverhead 30001
- Big Horn 30003
- Blaine 30005
- Broadwater 30007
- Carbon 30009
- Cascade 30013
- Chouteau 30015
- Daniels 30019
- Dawson 30021
- Fallon 30025
- Fergus 30027
- Flathead 30029
- Gallatin 30031
- Glacier 30035
- Golden Valley 30037
- Jefferson 30043
- Lake 30047
- Lewis and Clark 30049
- Lincoln 30053
- Madison 30057
- Meagher 30059
- Missoula 30063
- Musselshell 30065
- Park 30067
- Powder River 30075
- Powell 30077
- Roosevelt 30085
- Rosebud 30087
- Silver Bow 30093
- Stillwater 30095
- Toole 30101
- Wibaux 30109
- Yellowstone 30111
§5Sources & provenance
USDA PLANTS
Symbol, taxonomy, distribution, cultivation specs, native status. Public domain.
plants.usda.gov/COMA2 ↗GBIF Backbone
Canonical taxonomic identity, synonym resolution, cross-refs. CC0.
gbif.org/species/3034807 ↗Record version
Cached and built locally. Source version on this record:
usda-plants-mt-2026-05-25
fetched 2026-05-25T16:28:53Z