Index / Search / Osmorhiza occidentalis
§1 Plant
Osmorhiza occidentalis (Nutt. ex Torr. & A. Gray) Torr.
vernacular western sweetroot — species · Apiaceae
§2Habit & range
Habit and range
- Growth habit
- Forb/herb
- Duration
- Perennial
- Group
- Dicot
- Family
- Apiaceae Lindl.
- Genus
- Osmorhiza
§2a
Native status, by region
- CAN Canada Native
- L48 Lower 48 States Native
§2b
County-level range
· 158 counties across 9 states/territories§3Cultivation specs · USDA
Recorded by the USDA Plant Materials Program.
§3a
Tolerances
- Drought
- High
- Shade
- Low
- Moisture use
- Medium
- Fire
- High
- Salinity
- Low
- Anaerobic
- None
- CaCO₃
- Low
- Hedging
- None
§3b
Climate & soil
- Cold tolerance
- -38 °F minimum
- Frost-free days
- 110 min.
- Precipitation
- 16–35 in/yr
- pH range
- 5.2–7.5
- Root depth
- 16 in min.
- Fertility need
- Low
- Soil texture
- coarse, medium, fine
§3c
Form & growth
- Growth form
- Single Crown
- Growth rate
- Slow
- Lifespan
- Moderate
- Mature height
- 4 ft
- Foliage texture
- Medium
- Foliage colour
- Green
- Porosity (summer)
- Moderate
- Porosity (winter)
- Porous
- Flower colour
- Yellow
- Fruit colour
- Brown
- Fire resistant
- No
- N fixation
- None
- Toxicity
- Moderate
§3d
Reproduction
- Bloom period
- Spring
- Seed abundance
- Low
- Seed begins
- Spring
- Seed ends
- Summer
- Spread rate
- Slow
- Stratify
- No
- Seeds / lb
- 29,845
- Propagation
- seed
§3e
Use & availability
- Commercial availability
- No Known Source
- Nursery stock
- No
- Browse palatability
- High
- Graze palatability
- High
- Palatable, human
- No
- Protein potential
- Medium
- Lumber
- No
- Christmas tree
- No
§4Counties, by state
Recorded in 158 counties across 9 states/territories.
California view state ↗ 21 N ▾
Colorado view state ↗ 12 N ▾
Idaho view state ↗ 27 N ▾
- Ada 16001
- Adams 16003
- Bannock 16005
- Bear Lake 16007
- Benewah 16009
- Bingham 16011
- Blaine 16013
- Boise 16015
- Bonneville 16019
- Butte 16023
- Cassia 16031
- Custer 16037
- Elmore 16039
- Franklin 16041
- Fremont 16043
- Gem 16045
- Idaho 16049
- Latah 16057
- Lemhi 16059
- Lincoln 16063
- Madison 16065
- Nez Perce 16069
- Owyhee 16073
- Shoshone 16079
- Teton 16081
- Valley 16085
- Washington 16087
Montana view state ↗ 14 N ▾
Nevada view state ↗ 11 N ▾
Oregon view state ↗ 29 N ▾
- Baker 41001
- Benton 41003
- Clatsop 41007
- Columbia 41009
- Crook 41013
- Deschutes 41017
- Douglas 41019
- Grant 41023
- Harney 41025
- Hood River 41027
- Jackson 41029
- Jefferson 41031
- Josephine 41033
- Klamath 41035
- Lake 41037
- Lane 41039
- Linn 41043
- Malheur 41045
- Marion 41047
- Morrow 41049
- Multnomah 41051
- Tillamook 41057
- Umatilla 41059
- Union 41061
- Wallowa 41063
- Wasco 41065
- Washington 41067
- Wheeler 41069
- Yamhill 41071
Utah view state ↗ 23 N ▾
- Box Elder 49003
- Cache 49005
- Carbon 49007
- Daggett 49009
- Davis 49011
- Duchesne 49013
- Garfield 49017
- Grand 49019
- Iron 49021
- Juab 49023
- Millard 49027
- Morgan 49029
- Rich 49033
- Salt Lake 49035
- San Juan 49037
- Sanpete 49039
- Sevier 49041
- Summit 49043
- Tooele 49045
- Utah 49049
- Wasatch 49051
- Washington 49053
- Weber 49057
Washington view state ↗ 15 N ▾
§5Sources & provenance
USDA PLANTS
Symbol, taxonomy, distribution, cultivation specs, native status. Public domain.
plants.usda.gov/OSOC ↗GBIF Backbone
Canonical taxonomic identity, synonym resolution, cross-refs. CC0.
gbif.org/species/3034142 ↗Record version
Cached and built locally. Source version on this record:
usda-plants-mt-2026-05-26
fetched 2026-05-26T20:46:58Z