Astragalus nothoxys A. Gray

Hamosa madrensis (M. E. Jones) Rydberg
Astragalus madrensis M. E. Jones, Rev. Astrag. 274. 1923.
A perennial, with a taproot and woody cespitose caudex; stems decumbent at the base, 3-5 dm. high, striate, sparingly strigose; leaves 6-10 cm. long, ascending; stipules lanceolate, 3 mm. long; leaflets 15-21, oblong, 5-15 mm. long, cuneate at the base, usually retuse at the apex, sparingly strigose beneath, glabrous above; peduncles about 5 cm. long; racemes 4-6 cm. long, few-flowered; bracts lanceolate, 3 mm. long; calyx canescent, silky-strigose, the tube 5 mm. long, the teeth subulate, 2 mm. long; corolla about 1 cm. long, pale; banner obovate, striped with purple, strongly arched at the middle; wings about as long, the blade obliquely obovate, nearly straight; keel-petals much shorter, the blade lunate, obtuse; pod linear, slightly falcate, 1-1.5 cm. long, 2 mm. wide and 1.5 mm. thick, strongly reflexed, sulcate on the lower suture.
Type locality: Sierra Madre, Chihuahua. Distribution: Chihuahua and western Texas.

Hamosa nothoxys (A. Gray) Rydb. Bull. Torrey Club 54:330. 1927.
Astragalus nothoxys A. Gray, Proc. Am. Acad. 6: 232. 1864. Tragacantha nothoxys Kuntze, Rev. Gen. 946. 1891. Oxytropis nothoxys M. E. Jones, Proc. Calif. Acad. II. 5: 677. 1895. Spiesia nothoxys M. E. Jones, Proc. Calif. Acad. II. 5: 677. 1895. Aragallus nothoxys A. Heller, Cat. N. Am. PI. 4. 1898.
An annual or perennial, branched at the base; stems several, decumbent at the base, 1-4 dm. high, sparingly strigose or glabrate; leaves ascending, 3-8 cm. long; stipules lanceolate, 2-4 mm. long; leaflets 13-19, obovate or oval, rounded or retuse at the apex, 4—10 mm. long, glabrous above, strigulose beneath; peduncles 5-15 cm. long; racemes 2-8 cm. long, short in flowers, elongate in fruit; bracts lanceolate, 2 mm. long; calyx canescent-strigose', often with a few black hairs, the tube 4-5 mm. long, the teeth subulate, about 2 mm. long; corolla white or tipped with purple, about 1 cm. long; banner broadly obovate, slightly retuse, abruptly arcuate; wings nearly as long, the blade oblong below, spatulate above, with a basal auricle; wing-petals much shorter, the blade semiorbicular, acuminate, the beak erect, the basal auricle rounded; pod erect or ascending, 1.5—2 cm. long, 3 mm. wide, and 2.5 mm. thick, acuminate, minutely strigose, deeply cordate in cross-section.
Type locality: San Luis Mountains, Sonora. Distribution: Arizona, Sonora, and Chihuahua.

Hamosa gooddingii Rydb. Bull. Torrey Club 54: 20. 1927
A perennial, with a cespitose caudex; stems decumbent, about 1 dm. high, strigose; leaves spreading, 2-3 cm. long; stipules ovate, 2-3 mm. long; leaflets 9-13, obovate to elliptic, rounded or obtuse at the apex, 3-5 mm. long, 2-3 mm. wide, glabrous above, strigose beneath; peduncles 7-10 cm. long, strigose, arcuate; racemes 2-4 cm. long; bracts 2 mm. long, lanceolate; calyx strigose with mixed black and white hairs, the tube 4 mm. long, the teeth subulate, 2 mm. long; corolla dark, bluish-purple, about 1 cm. long; banner obovate, retuse; wings shorter, the blade oblong-falcate, with a broad basal auricle; keel-petals much shorter, the blade broadly lunate, strongly arched, rounded at the apex; pod lance-linear, 1.5-2 cm. long, 3 mm. wide and thick, somewhat falcate, minutely strigose or in age glabrate, deeply cordate in cross-section, membranous.
Type locality: Rocky slope in the Huachuca Mountains, Arizona. Distribution: Known only from the type locality.

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

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