Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east to Idaho and Utah.
Habitat: Dry, open areas, including on lithosols, from lowlands to middle elevations in the mountains.
Growth Duration: Perennial
Conservation Status: Not of concern
Glabrous, glaucous perennial from a stout taproot and simple crown, the solitary or several stems 2-9 dm. tall.
Leaves mostly basal, firm, ternately or ternate-pinnately 1-3 times compound, with 3-30 well-defined, veiny ultimate leaflets, these lanceolate or ovate to sub-rotund, 2-9 cm. long and 1-6 cm. wide, entire or somewhat toothed or lobed.
Inflorescence of compound umbels, the rays unequal, 6-20 cm. long at maturity, the peduncle often swollen and hollow below the umbel; involucre and involucel none; calyx obsolete; flowers pale yellow; secondary umbels many-flowered; pedicels 3-15 mm. long.
Fruit oblong, 7-15 mm. long, sometimes narrowed to a short, beaklike tip; wings about as wide as the body.