Page authors: Don Knoke, David Giblin
Lomatium columbianum
purple biscuit-root, Columbia Gorge desert-parsley

Distribution: Occurring east of the Cascades crest in the south-central and Columbia River Gorge areas in Washington; south-central Washington to Hood River and Wasco counties in Oregon.

Habitat: Open slopes in low elevation valleys to low montane.

Flowers: March-April

Origin: Native

Growth Duration: Perennial

Conservation Status: Not of concern

Pollination: Bees, flies, butterflies, beetles, wasps


Stout, aromatic, glabrous and glaucous perennial from a very thick, woody taproot and crown, 3-6 dm. tall, with several stems from the base.


Leaves light green, mostly basal, ternate-pinnately dissected into numerous linear ultimate segments up to 2 cm. long and 1 mm. wide; bladeless basal sheathes well developed and conspicuous.


Inflorescence a compound umbel, the rays 7-14, nearly equal, 4-20 cm. long; involucre wanting; involucel of well-developed, narrow bractlets; pedicels 10-30 mm. long at maturity; calyx teeth obsolete, flowers pinkish purple.


Fruit elliptic to oblong-ovate, 16-28 mm. long and 8-15 mm. wide, the lateral wings thickened, up to 1/3 as wide as the body.

Accepted Name:
Lomatium columbianum Mathias & Constance
Publication: Bull. Torrey Bot. Club 69: 246. 1942.

Synonyms & Misapplications:
Leptotaenia purpurea
Additional Resources:

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

WA Flora Checklist: Lomatium columbianum checklist entry.

OregonFlora: Lomatium columbianum information.

E-Flora BC: Lomatium columbianum atlas page.

CalPhotos: Lomatium columbianum photos.

USDA Plants: Lomatium columbianum information.

48 photographs:
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