Astragalus micranthus Desv.

Hamosa saltonis (M. E. Jones) Rydb. Bull. Torrey Club 54:332. 1927.
Astragalus Saltonis M. E. Jones, Rev. Astrag. 279. 1923.
A perennial, with creeping rootstock; stems decumbent, flexuose, often branched below, 3-4 dm. high, sparingly strigose, sulcate; leaves spreading, 6-10 cm. long, the rachis strigose; stipules deltoid, 3-4 mm. long; leaflets 17-29, linear or oblong, obtuse, glabrous above, strigose beneath, 10-18 mm. long, 1-3 mm. wide; peduncles about 1 dm. long; racemes elongate, manyflowered, 5-10 cm. long; bracts lanceolate, 3-5 mm. long; pedicels 1 mm. long, reflexed; calyx black-hairy, the tube 2 mm. long and nearly as broad, gibbous at the base on the upper side, the teeth subulate, 1 mm. long; corolla white, only the keel sometimes tipped with purple; banner broadly obovate, 5-7 mm. long, strongly arched at the middle; wings nearly as long, the blade obliquely obovate, falcate, with a large auricle; keel-petals slightly shorter, the blade broadly obliquely obovate, with a large auricle; pod 1-1.5 cm. long, 3 mm. wide and thick, black-hairy with short hairs, oblong, slightly falcate, obliquely acute at the apex, the lower suture sulcate.
Type locality: Salto de Aqua, State of Mexico.
Distribution: Puebla to Hidalgo.

Atelophragma rosei (M. E. Jones) Rydb. Bull. Torrey Club 55: 163. 1928. Astragalus Rosei M. E. Jones, Rev. Astrag. 190. 1923.
A perennial; stems 3-5 dm. long, decumbent below, striate and sparingly strigose, flexuose; leaves 6-10 cm. long, ascending, the rachis strigose; stipules deltoid, about 3 mm. long; leaflets 19-25, oblong, 8-20 mm. long, 2-4 mm. wide, glabrous above, strigose beneath, cuneate at the base, obtuse or rounded at the apex; peduncles 6-10 cm. long; racemes dense, 3-10 cm. long; bracts lance-subulate, 3-5 mm. long; flowers reflexed ; pedicels 1 mm. long or less; calyx blackhairy, the tube 2.5 mm. long, nearly 2 mm. broad, the teeth subulate, 1 mm. long; corolla cream-colored, 7-8 mm. long; banner obovate, strongly arched, slightly reflexed; wings fully as long, the blade obliquely obovate, falcate, with a large auricle; keel-petals shorter, the blade broadly obovate, rounded at the apex; pod subsessile, ellipsoid, minutely black-strigose, 10—12 mm. long, 4—5 mm. thick, 3-4 mm. wide, rounded at the base, obtuse or rounded at the apex, the septum fully 1 mm. wide; seeds 8-10.
Type locality: Above Dos Rios, State of Mexico. Distribution: Mexico (state and federal district).

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

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