Distribution: Occurring west of the Cascades crest in southwestern Washington; southern Washington to California.
Habitat: Moist to dry meadows and open slopes or flats, from low to moderate elevations.
Conservation Status: Historical in Washington (WANHP)
Slender, glabrous perennial from a tuberous-thickened, edible, bundle of roots, the solitary stem 3-6 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 well-developed, bristly bractlets 0.6-1.0 mm. wide; calyx teeth well developed; flowers white.
Fruit glabrous, oblong-ovate, longer than wide, 2.5-4 mm. long, with prominent ribs.