Distribution: East of the Cascades in Washington; widely distributed east of the Continental Divide in Montana south to Colorado.
Habitat: Dry, open areas at low 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; leaves ternately 2-3 times cleft into long, linear segments, 1-10 cm. long.
Inflorescence of compound umbels, the rays unequal, 2-10 cm. long at maturity; involucre none, involucel bractlets inconspicuous; calyx teeth none; flowers light yellow.
Fruit broadly elliptic, 7-15 mm. long and 3-7 mm. wide, the lateral wings about as wide as the body.