Distribution: Occurring chiefly west of the Cascades crest in Washington; British Columbia south to California.
Habitat: Uncommon at low to moderate elevations in dry, open areas.
Conservation Status: Not of concern
Taprooted perennial, the solitary or few branching stems 1-6 dm. tall.
Leaves mostly basal, long-petiolate, the blade 4-13 cm. long and 3-12 cm. wide, pinnatifid or bipinnatifid, with a winged, toothed rachis, the segments also toothed; cauline leaves few and reduced, becoming sessile.
Primary umbels few-rayed and irregular, ultimate umbels with about 20 flowers and head-like; involucre of leafy bracts; involucel of lanceolate bractlets less than 4 mm. long; calyx lobes soft, lance-ovate, 1 mm. long; flowers brownish-red to purple.
Fruit ovoid to sub-globose, 3-6 mm. long and 2-4 mm. wide, covered with stout, recurved prickles.