Cook’s Lomatium
Cook’s Lomatium is recognizable by a low parsley relative with finely divided leaves and small yellow umbels.
Artwork inspired by James Lavadour
It occurs in seasonally wet meadows and vernal pools in the Agate Desert and Illinois Valley; combine anatomy, season, and habitat because a name or single photograph is not enough when related species overlap. Endangered; development, altered hydrology, weeds, and trampling threaten habitat.
Rare-plant coordinates should not be public. March–May in wet vernal-pool margins. low parsley relative with finely divided leaves and small yellow umbels.
- Primary range
- Oregon
- Habitat
- seasonally wet meadows
- Status
- Endangered
Quick guide
- Time water
- Search only from legal edges during spring bloom.
- Notice leaves
- Finely divided foliage supports identification.
Field marks for Cook’s Lomatium
- Growth form
- Low parsley relative with finely divided leaves and small yellow umbels.
- Leaf or stem
- Seasonally wet meadows and vernal pools in the Agate Desert and Illinois Valley.
- Habitat test
- From March through May, inspect wet vernal-pool margins from legal edges without crossing fragile basin soils.
- Document lightly
- Rare-plant coordinates should not be public.
Good to know
Endangered; development, altered hydrology, weeds, and trampling threaten habitat. Protect Cook’s Lomatium by observing a low parsley relative with finely divided leaves and small yellow umbels from durable ground, leaving seasonally wet meadows and vernal pools in the Agate Desert and Illinois Valley undisturbed, and sharing sensitive coordinates only with conservation staff.
Notice these
- A low parsley relative with finely divided leaves and small yellow umbels
- seasonally wet meadows and vernal pools in the Agate Desert and Illinois Valley
- March–May in wet vernal-pool margins