Woody Milkvetch

Homalobus hylophilus Rydb. Mem. N. Y. Bot Gard. 1: 247. 1900.
Astragalus hylophilus A. Nelson; Coult. & Nels. Man. Rocky Mt. 291. 1909. Astragalus campeslris hylophilus M. E. Jones, Rev. Astrag. 75. 1923.
A cespitose perennial, with a rootstock, branched near the surface; stems many, 1-3 dm. high, slender, slightly strigose or glabrate; stipules scarious, the upper lanceolate, 5 mm. long, the lower triangular, connate around the stem and somewhat adnate to the petioles; leaves 0.8-1.5 dm. long, pinnate; leaflets 13-25, usually about 17, oblong or oval, or in open places linear, glabrous above, sparingly strigose beneath, 8-30 mm. long, 2-10 mm. wide, rounded to acute at each end; peduncles 5-12 cm. long; racemes short, 6-12-flowered, in fruit more lax; bracts lanceolate to linear, subulate, 1-2 mm. long; calyx strigose with dark hairs, the tube 2.5-3 mm. long; corolla almost white, tinged with purple, and the keel purple-tipped; banner broadly obovate, retuse, refiexed at the middle; blades of the wings 8 mm. long, obliquely lunateobovate, rounded at the apex, with an acute basal auricle, the claws less than half as long as the blade; keel-petals 8 mm. long, the blade lunate, with a lanceolate obtuse tip and a rounded basal auricle; pod linear, sessile, glabrous, 2.5-3 cm. long, 3 mm. wide; seeds broadly oblong, fully 2.5 mm. long, barely 2 mm. wide, brown.
Type locality: Bridger Mountain, Montana.
Distribution: Montana to South Dakota, Utah, and Idaho.