Astragalus vaccarum A. Gray

Hamosa militaris (M. E. Jones) Rydberg, Bull. Torrey Club 54: 332. 1927.
Astragalus militaris M. E. Jones, Rev. Astrag. 278. 1923.
A perennial; stems several, decumbent at the base, slender, 2-4 dm. long, glabrous or nearly so, striate; leaves 4-8 cm. long, spreading or ascending; stipules lanceloate, 2-3 mm. long, green, strigose; leaflets 11-17, elliptic to narrowly oblong, 5-15 mm. long, 2-5 mm. wide, obtuse or rounded at the apex, strigose beneath, glabrous above; peduncles erect, 7-10 cm. long; bracts lanceolate, 1-2 mm. long, ciliolate; calyx sparingly strigose, the tube 2.5 mm. long, the teeth subulate, 1 mm. long; corolla dark-purple, 7-8 mm. long; banner obovate, deeply notched, strongly arched; wings nearly as long, the blade lanceolate, acutish, strongly falcate; keel-petals much shorter, broadly lunate, rounded at the apex; pod reflexed, lance-oblong, falcate, acute at each end, 12-15 mm. long, 2 mm. wide and 3 mm. thick, finely strigose with white hairs, acutely sulcate on the lower suture, deeply cordate in cross-section.
Type locality: Soldier Canon, Sierra Madre, Chihuahua. Distribution: Chihuahua and San Luis Potosi.

Hamosa vaccarum (A. Gray) Rydb. Bull. Torrey Club
54: 334. 1927.
Astragalus vaccarum A. Gray, PI. Wright. 2: 43. 1853. Astragalus Daleae Greene, Pittonia 1: 153. 1888. Tragacanlha vaccarum Kuntze, Rev. Gen. 949. 1891.
A perennial; stems slender, 2-5 dm. high, sparingly strigose; leaves ascending, 4-10 cm. long, the rachis strigose; stipules lanceolate, 4—5 mm. long; leaflets 9-19, linear or oblong, 5-20 mm. long, 1.5-3 mm. wide, glabrous above, strigose beneath, mostly obtuse at the apex; peduncles 5-9 cm. long; racemes elongate, many-flowered, 4—8 cm. long; bracts subulate, 1-2 mm. long; pedicels less than 1 mm. long; flowers drooping; calyx white-hairy, the tube campanulate, 1.5 mm. long, the teeth subulate, less than 1 mm. long; corolla ochroleucous, similar to that of the preceding, but smaller, only 4-5 mm. long, and the banner more strongly arched; pod strongly falcate, minutely white-hairy, scarcely 1 cm. long, 1.5 mm. wide, and 2 mm. thick, cordate in cross-section. Scarcely distinct from //. Harlwegii.
Type locality: Ojo de Vaca, west of the Copper mines, New Mexico. Distribution: New Mexico to Sonora and Durango.