Distribution: Occurring on both sides of the Cascades crest in Washington; southern British Columbia to California, east to the Rocky Mountains and northern Great Plains.
Habitat: Woodland edge, balds, prairies, outcroppings, and vernally wet meadows from the lowlands to middle elevations in the mountains.
Conservation Status: Not of concern
Slender, glabrous perennial from a tuberous-thickened, edible, usually solitary root, the solitary stem 4-12 dm. tall.
Leaves several, well distributed along the stem, the blade once pinnate or ternate; the ultimate segments elongate and narrow.
Inflorescence of terminal and 1-several lateral compound umbels, the umbels 2.5-7 cm. wide; rays up to 6 cm. long at maturity; involucre of a few, narrow bracts; involucel of bristly bractlets, or wanting; calyx teeth well developed; flowers white.
Fruit glabrous, sub-orbicular, 2-3 mm. long and wide, with prominent ribs.