Smooth Loco Milkvetch

Homalobus subglaber (A. Gray) Rydb. Bull. Torrey Club 51:17. 1924.
Astragalus collinus subglaber A. Gray; Rydb. Bull. Torrey ClubSl: 17, as synonym. 1924.
A perennial, with a cespitose caudex; stems 2-3 dm. high, striate, glabrous or nearly so; stipules deltoid, distinct, 2 mm. long; leaves 4-8 cm. long; leaflets 11-25, oblong, obovate, or oblanceolate, 5-10 mm. long, 2-5 mm. wide, glabrous above, sparingly short-hairy beneath, often only on the margins and midrib, truncate or retuse at the apex, acute at the base; peduncles 5-10 cm. long; raceme 3-5 cm. long; bracts lanceolate, 2 mm. long; calyx villous, the tube 8 mm. long, gibbous on the upper side, the upper two teeth broadly triangular, the lower three lanceolate, 0.5 mm. long; corolla ochroleucous, 14 mm. long, similar to that of H. collinus; pod sparingly short-pubescent, stipitate, the stipe 8-10 mm. long, the body arcuate, 12-18 mm. long, 3 mm. wide.
Type locality: John Day River, Oregon.
Distribution: Northern Oregon.