Distribution: Occurring east of the Cascades crest in the southeastern counties in Washington; southeastern Washington to the Hells Canyon area of Oregon and Idaho.
Habitat: Dry, open, often rocky slopes from lowland valleys to the montane.
Flowers: April-July
Origin: Native
Growth Duration: Perennial
Conservation Status: Sensitive in Washington (WANHP)
Pollination: Bees, flies, butterflies, beetles, wasps
Glabrous, acaulescent, parsley-scented perennial from a stout taproot and branching, woody base, 1.5-4 dm. tall.
Leaves bright green, ternate-pinnately dissected into moderately numerous, small, flat ultimate segments 1-6 mm. long and up to 2.5 mm. wide, the segments tending to lie in the same plane.
Inflorescence of compound umbels, the rays unequal, 2-8 cm. long at maturity; involucre wanting; involucel of several well-developed, narrow bractlets; calyx teeth none; flowers yellow; pedicels 3-15 mm. long.
Fruit elliptic, 5.5-10 mm. long, glabrous, the lateral wings one-half as wide to as wide as the body.
Publication: Ann. Missouri Bot. Gard. 25(1): 271. 1937.
PNW Herbaria: Specimen records of Lomatium serpentinum in the Consortium of Pacific Northwest Herbaria database.
WA Flora Checklist: Lomatium serpentinum checklist entry.
OregonFlora: Lomatium serpentinum information.
E-Flora BC: Lomatium serpentinum atlas page.
CalPhotos: Lomatium serpentinum photos.
USDA Plants: Lomatium serpentinum information.
