Bolander's Milkvetch

Hesperonix bolanderi (A. Gray) Rydberg
Astragalus Bolanderi A. Gray, Proc. Am. Acad. 7: 337. 1868. Tragacanlha Bolanderi Kuntze, Rev. Gen. 943. 1891. Astragalus supervacaneus Greene, Erythea 1: 221. 1893.
A perennial, with a woody root and cespitose caudex; stems erect, 3-5 dm. high, angled and somewhat sulcate, sparingly hairy; leaves ascending, 8-12 cm. long; stipules deltoid, 5 mm. long; leaflets 17-25, oblong to oval, 8-20 mm. long, 3-7 mm. wide, appressed-pilose on both sides, obtuse at the apex; peduncles 5-10 cm. long, erect, sulcate; bracts subulate, 3-4 mm. long; pedicels 1 mm. long; calyx pilose with mixed black and light hairs, the tube 6 mm. long, the teeth subulate, 3-4 mm. long, unequal; corolla white or cream-colored; banner oblanceolate, slightly emarginate, 14-15 mm. long; wings shorter, the blade equaling the claw, obliquely oblanceolate, with a rather large auricle; keel-petals still shorter, the blade broadly lunate; pod chartaceous, stipitate, the stipe about 8 mm. long, the body strongly incurved, obliquely ovate, about 2 cm. long, 1-1.5 cm. thick, 8-10 mm. wide, sulcate on both sutures.
Type locality: Ostrander's Ranch, Yosemite Valley, California.
Distribution: Sierra Nevada region, California.