Distribution: Occurring west of the Cascades crest in Washington; Washington to California.
Habitat: Low elevation woodland slopes, prairies, and thickets.
Conservation Status: Not of concern
Somewhat branched, usually glabrous perennial from a taproot, 4-10 dm. tall.
Leaves 2-3 pinnate, the ultimate leaflets up to 5 cm. long and 4 cm. wide, varying from toothed to deeply cleft; basal leaves large and long-petiolate, the cauline leaves well developed but progressively smaller and shorter-petiolate upward.
Inflorescence of compound umbels, rays 12-30, 2.5-6 cm. long; involucre and involucels wanting; calyx teeth obscure; petals five, white.
Fruit broadly elliptic, 3-5.5 mm. long, glabrous, the ribs raised but not winged.