Astragalus arizonicus A. Gray

Hamosa arizonica (A. Gray) Rydb. Bull. Torrey Club 54:22. 1927.
Astragalus arizonicus A. Gray. Proc. Am. Acad. 7: 398. 1868. Tragacantha arizonica Kuntze, Rev. Gen. 943. 1891.
A perennial; stems white-strigose, procumbent or prostrate, flexuose, 2-5 dm. long; leaves ascending, 6-10 cm, long; stipules deltoid, about 3 mm. long; leaflets 9-17, linear or oblong, mostly acute, 1-3 cm. long, 2-3 mm. wide, silky-canescent on both sides; peduncles 5-15 cm. long; racemes elongate, 3-8 cm. long; calyx white-strigose, rarely with some black hairs, the tube 4 mm. long, the teeth subulate, with a deltoid base, 2 mm. long; corolla white, about 1 cm. long; banner obovate; wings slightly shorter, the blade oblong, falcate, obtuse, with a reflexed auricle; keel-petals slightly longer, broadly lunate, strongly arcuate near the slightly produced but blunt tip; pod linear, 2-4 cm. long, slightly arcuate, strigose, slightly sulcate on the lower suture, cuneately cordate in cross-section.
Type locality: Near Camp Grant, Arizona. Distribution: New Mexico, Arizona, and Sonora.

Perennial, Herbs, Stems woody below, or from woody crown or caudex, Taproot present, Nodules present, Stems or branches arching, spreading or decumbent, Stems prostrate, trailing, or mat forming, Stems less than 1 m tall, Stems solid, Stems or young twigs sparsel y to densely hairy, Stems silvery, canescent, tomentose, cobwebby, or wooly, Stems with 2-branched hairs, dolabriform, 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 5-9, Leaflets 10-many, Leaves hairy on one or both surfaces, Inflorescences racemes, Inflorescence axillary, Inflorescence or flowers lax, declined or pendulous, Bracts very small, absent or caducous, Flowers zygomorphic, Calyx 5-lobed, Calyx glabrous, Petals separate, Corolla papilionaceous, Petals clawed, Petals pinkish to rose, 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, Stamens 9-10, Stamens diadelphous, 9 united, 1 free, Filaments glabrous, Style terete, Style persistent in frui t, Fruit a legume, Fruit freely dehiscent, Fruit oblong or ellipsoidal, Fruit coriaceous or becoming woody, Fruit exserted from calyx, Fruit beaked, Fruit hairy, Fruit 11-many seeded, Seeds cordiform, mit-shaped, notched at one end, Seed surface smooth, Seeds olive, brown, or black.

Astragalus arizonicus is a species of milkvetch in the family Fabaceae.

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

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