Distribution: Occurring chiefly east of the Cascades crest in Washington; British Columbia south to California, east to the Rocky Mountains.
Habitat: Dry to somewhat moist open areas, low to mid-elevations.
Conservation Status: Not of concern
Perennial from an elongate and slightly thickened taproot, 2-8 dm. tall, the stems solitary or few, erect, covered with fine but stiff hairs.
Leaves chiefly basal or low-cauline, but usually one or more reduced leaves on the middle or upper stem; leaves ternately or ternate-pinnately 2-3 times cleft into long, narrow or broader segments, 1-10 cm. long, highly variable in this feature.
Inflorescence of compound umbels, the rays unequal, 2-10 cm. long at maturity; involucre none, involucel bractlets inconspicuous; calyx teeth none; flowers yellow.
Fruit oblong and narrow, glabrous, 7-15 mm. long and 2-4 mm. wide, the lateral wings less than half the width of the body.