Distribution: Occurring east of the Cascades crest in Washington, chiefly in the Columbia River Basin; central Washington to northeastern Nevada, east to southwestern Idaho.

Habitat: Scablands and sagebrush steppe in rather deep soil.

Flowers: March-April

Origin: Native

Growth Duration: Perennial

Conservation Status: Not of concern

Pollination: Bees, flies, butterflies, beetles, wasps

Glabrous, nearly scapose perennial from a globose-thickened taproot, the scapes up to 2 dm. tall.

Leaves all basal, pinnately dissected into numerous, crowded, rounded ultimate segments not over 5 cm. long. Taproot globose-thickened up to 3.5 cm, surmounted by an elongate, cylindrical, slender upper portion.

Inflorescence a compound umbel, the rays unequal, 2.5-7 cm. long; scapes 1-several, ascending; involucre wanting; involucel bractlets narrow and inconspicuous, 1-3 mm. long; pedicels becoming elongate, 4-15 mm. long in fruit; calyx teeth obsolete; petals white, with usually dark purple, but occasionally yellow, stamens.

Fruit glabrous, broadly elliptic, 6-10 mm. long, the thin wings about half as wide as the body.