Astragalus wrightii A. Gray

Hamosa wrightii (A. Gray) Rydberg
Astragalus Wrightii A. Gray, Bost. Jour. Nat. Hist. 6: 176. 1850. Tragacantha Wrightii Kuntze, Rev. Gen. 949. 1891.
An annual; stem branched at the base, 1-2 dm. high, sulcate, villous, the branches erect or ascending; leaves 2-4 cm. long, ascending; stipules deltoid or lanceolate, green, acuminate, 3-5 mm. long; leaflets 7-11, oblong or elliptic, acute, light-green, 1-2 cm. long, pilose on both sides; peduncles 2-6 cm. long; racemes dense, headlike; bracts lance-subulate, 4-5 mm. long; flowers subsessile; calyx silkyvillous, the tube turbinate, 2 mm. long, the teeth subulate, 4 mm. long; corolla dark-bluish-purple, shorter than the calyx; petals subequal, 5 mm. long; banner obovate, distinctly clawed; blade of the wings lunate, longer than the claw, with a lanceolate, retrorse auricle; keel-petals similar, but the blade broader and shorter; pod lanceoblong, about 1 cm. long, 3-4 mm. wide and about as thick, villous, tapering at the apex, the cross-section cordate; seeds brown-spotted, obliquely round-reniform, 2 mm. long.
Type locality: Near Austin, Texas.
Distribution: Texas.

Annual, Herbs, Taproot present, Nodules present, Stems erect or ascending, Stems or branches arching, spreading or decumbent, Stems less than 1 m tall, Stems solid, Stems or young twigs sparsely to densely hairy, Stem hairs hispid to villous, 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, Flowers in axillary clusters or few-floweredracemes, 2-6 flowers, Inflorescences racemes, Inflorescences globose heads, capitate or subcapitate, Inflorescen ce axillary, Bracts very small, absent or caducous, Flowers zygomorphic, Calyx 5-lobed, Calyx hairy, Petals separate, Corolla papilionaceous, Petals clawed, Petals red, 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, Keel 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 freely dehiscent, Fruit oblong or ellipsoidal, Fruit or valves persistent on stem, Fruit exserted from calyx, Fruit beaked, Fruit hairy, Fruit 3-10 seeded, Seeds cordiform, mit-shaped, notched at one end, Seed surface smooth, Seeds olive, brown, or black.

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

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