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).