Page authors: Don Knoke, David Giblin
Lomatium rollinsii
Rollins's biscuit-root, Rollins's desert-parsley

Distribution: Occurring east of the Cascades crest in the southeastern counties in Washington; southeastern Washington to the canyons of the Snake and lower Salmon Rivers in eastern Oregon and western Idaho.

Habitat: Open slopes in grasslands, on rocky or fine-textured, loess-derived soils, from valleys to the montane.

Flowers: April-May

Origin: Native

Growth Duration: Perennial

Conservation Status: Threatened in Washington (WANHP)

Pollination: Bees, flies, butterflies, beetles, wasps


Sparingly-branched perennial from a short taproot, 2-7 dm. tall.


Leaves cauline and basal, irregularly pinnately dissected into unequal narrow segments up to 1 cm. long. Taproot short, tuberous-thickened or with 2 or more globose-thickened portions.


Inflorescence of compound umbels, the rays 3-7 cm. long at maturity; involucre none; involucel of inconspicuous, narrow bractlets; calyx teeth obsolete, flowers yellow; pedicels 4-10 mm. long.


Fruit glabrous, elliptic, 5-8 mm. long, the lateral wings well-developed, but barely as wide as the body.

Accepted Name:
Lomatium rollinsii Mathias & Constance
Publication: Bull. Torrey Bot. Club 70: 59. 1943.

Synonyms & Misapplications:
(none provided)
Additional Resources:

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

WA Flora Checklist: Lomatium rollinsii checklist entry.

OregonFlora: Lomatium rollinsii information.

E-Flora BC: Lomatium rollinsii atlas page.

CalPhotos: Lomatium rollinsii photos.

USDA Plants: Lomatium rollinsii information.

15 photographs:
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