Page authors: Don Knoke, David Giblin
Lomatium serpentinum
Snake Canyon desert-parsley
WTU specimens
Other herbaria

Distribution: Near the Snake River Canyon, western Idaho, eastern Oregon and extreme southeast Washington.

Habitat: Open, often rocky slopes.

Flowers: April - July

Origin: Native

Conservation Status: Sensitive in Washington (WANHP)


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.

Accepted Name:
Lomatium serpentinum (M.E. Jones) Mathias

Synonyms & Misapplications:
Cogswellia fragrans
Additional Resources:

PNW Herbaria: Specimen records of Lomatium serpentinum in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Lomatium serpentinum checklist entry.

E-Flora BC: Lomatium serpentinum atlas page.

CalPhotos: Lomatium serpentinum photos.

USDA Plants: Lomatium serpentinum information.

15 photographs:
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