Page authors: Don Knoke, David Giblin
Lomatium nudicaule
bare-stemmed biscuit-root

Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east to Idaho and Utah.

Habitat: Dry, open areas, including on lithosols, from lowlands to middle elevations in the mountains.

Flowers: April-June

Origin: Native

Growth Duration: Perennial

Conservation Status: Not of concern

Pollination: Bees, flies, butterflies, beetles, wasps


Glabrous, glaucous perennial from a stout taproot and simple crown, the solitary or several stems 2-9 dm. tall.


Leaves mostly basal, firm, ternately or ternate-pinnately 1-3 times compound, with 3-30 well-defined, veiny ultimate leaflets, these lanceolate or ovate to sub-rotund, 2-9 cm. long and 1-6 cm. wide, entire or somewhat toothed or lobed.


Inflorescence of compound umbels, the rays unequal, 6-20 cm. long at maturity, the peduncle often swollen and hollow below the umbel; involucre and involucel none; calyx obsolete; flowers pale yellow; secondary umbels many-flowered; pedicels 3-15 mm. long.


Fruit oblong, 7-15 mm. long, sometimes narrowed to a short, beaklike tip; wings about as wide as the body.

Accepted Name:
Lomatium nudicaule (Pursh) J.M. Coult. & Rose
Publication: Contr. U.S. Natl. Herb. 7(1): 238. 1900.

Synonyms & Misapplications:
Cogswellia nudicaulis (Pursh) M.E. Jones
Lomatium platyphyllum
Additional Resources:

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

WA Flora Checklist: Lomatium nudicaule checklist entry.

OregonFlora: Lomatium nudicaule information.

E-Flora BC: Lomatium nudicaule atlas page.

CalPhotos: Lomatium nudicaule photos.

USDA Plants: Lomatium nudicaule information.

54 photographs:
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