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.

Perennial, Herbs, Stems woody below, or from woody crown or caudex, Taproot present, Nodules present, Stems erect or ascending, Stems less than 1 m tall, Stems solid, Stems or young twigs sparsely to densely hairy, Leaves alternate, Leaves petiolate, Stipules conspicuous, Stipules membranous or chartaceous, Stipules persistent, Stipules free, Leaves compound, Leaves odd pinnate, Leaf or leaflet margins entire, Leaflets opposite, Leaflets 10-many, Leaves hairy on one or both surfaces, Inflorescences racemes, Inflorescence axillary, Bracts very small, absent or caducous, Flowers zygomorphic, Calyx 5-lobed, Calyx hairy, Petals separate, Corolla papilionaceous, Petals clawed, Petals blue, lavander to purple, or violet, Banner petal narrow or oblanceolate, Wing petals narrow, oblanceolate to oblong, Wing tips obtuse or rounded, Keel petals auriculate, spurred, or gibbous, K eel tips obtuse or rounded, not beaked, Stamens 9-10, Stamens diadelphous, 9 united, 1 free, Filaments glabrous, Style terete, Style persistent in fruit, Fruit a legume, Fruit tardily or weakly dehiscent, Fruit oblong or ellipsoidal, Fruit exserted from calyx, Fruit beaked, Fruit glabrous or glabrate, Fruit hairy, Fruit 3-10 seeded, Seeds cordiform, mit-shaped, notched at one end, Seed surface smooth, Seeds olive, brown, or black.

Astragalus vaccarum adalah spesies tumbuhan yang tergolong ke dalam famili Fabaceae. Spesies ini juga merupakan bagian dari ordo Fabales. Spesies Astragalus vaccarum sendiri merupakan bagian dari genus Astragalus. Nama ilmiah dari spesies ini pertama kali diterbitkan oleh A.Gray.

Astragalus vaccarum là một loài thực vật có hoa trong họ Đậu. Loài này được A.Gray miêu tả khoa học đầu tiên.