Distribution: Along the Snake River from the Clearwater to the Tucannon River, Whitman and Columbia Counties, WA, and in Nex Perce County, ID.
Habitat: Dry bluffs and canyon banks.
Flowers: May - June
Conservation Status: Imperiled in Washington (WANHP)
Gray or greenish perennial from a woody taproot and crown, the erect stems tufted, 4-15 cm. long.
Leaves alternate, pinnate, 1-2 dm. long; leaflets 21-33, linear-oblong to narrowly oblanceolate, 4-21 mm. long, glabrous above; stipules 2.5-7 mm. long, papery, clasping but free.
Inflorescence of 10- to 20-flowered racemes, the peduncles stout, 14-30 cm. long, surpassing the leaves; pedicles ascending, 2-5 mm. long; flowers pale yellowish to greenish-white, drying yellowish; calyx 7-10 mm. long, with fine, black hairs, the 5 teeth 2-5 mm. long; banner 11.5-14 mm. long, recurved, the margins becoming lacerate, the wings longer than the banner; stamens 10.
Pod erect, sessile, oblong-ellipsoid, 1.5-2.5 cm. long and 6-10 mm. thick, with a rigid beak.