Astragalus straturensis M. E. Jones

Tium atratiforme Rydberg
Hamosa atratiformis Rydb. Bull. Torrey Club 34: 48. 1907.
Astragalus stralurensis Tidestrom, Contr. U. S. Nat. Herb. 25: 326. 1925. Not A. slraturensis M. E. Jones. 1898.
A perennial, with a cespitose caudex; stems erect, 2-3 dm. high, slender, strigose; leaves 3-5 cm. long, ascending, the rachis strigose; stipules deltoid, strigose, 1-2 mm. long; leaflets 13-19, oblong, strigose beneath, glabrous above, 4—6 mm. long, obtuse to slightly retuse at the apex; peduncles 5-7 cm. long; racemes lax, 2-3 cm. long; bracts lanceolate, 1-1.5 mm. long; pedicels 1 mm. long; calyx black-strigose, the tube about 2 mm. long, the teeth subulate, 1 mm. long; corolla ochroleucous or white, with purple-tipped keel; banner about 7 mm. long, obovate, strongly arched at the middle, retuse at the apex; wings a little shorter, the blade oblanceolate; keel-petals much shorter, the blade broadly lunate, strongly curved above the middle, obtuse at the apex; pod subsessile, straight, minutely strigulose, about 1.5 cm. long.
Type locality: Southern Utah.
Distribution: Southwestern Utah and northwestern Arizona.

Atelophragma straturense (M. E. Jones) Rydb. Bull. Torrey Club 55: 162. 1928.
Astragalus stralurensis M. E. Jones, Contr. W. Bot. 8: 19. 1898.
A perennial, with a woody root; stem branched, 4-9 dm. high, striate, sparingly strigose, straw-colored, flexuosc; leaves ascending, 7-10 cm. long, the rachis strigose; stipules deltoid or lanceolate, acuminate, 3 mm. long, reflexed, green; leaflets 13-19, oblong or oblanceolate, 1-2 cm. long, 2-6 mm. wide, cuneate at the base, obtuse, truncate, or retuse at the apex, glabrous above, strigose beneath; peduncles slender, 6-10 cm. long; racemes lax, 5-10 cm. long; bracts lanceolate, 1-2 mm. long; pedicels 1 mm. long; calyx black-hairy, the tube acute at the base, 2.5 mm. long, the teeth lance-subulate, 1 mm. long; corolla purplish, about S mm. long; banner obovate, rather strongly arcuate at the middle; wings slightly shorter, the blade oblanceolate, falcate; keel-petals much shorter, the blade broadly obliquely obovate, rounded at the apex; pod strigose, the stipe 2 mm. long, the body oblanceolate in outline, somewhat falcate, 15-20 mm. long, 3 mm. wide, sulcate on the lower suture; septum about 1 mm. wide.
Type locality: Silver Reef, Utah. Distribution: Known only from the type locality.

Perennial, Herbs, S tems woody below, or from woody crown or caudex, Taproot present, Nodules present, Stems erect or ascending, 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 glabrous or sparsely glabrate, Stems or young twigs sparsely to densely hairy, 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 10-many, Leaves hairy on one or both surfaces, Inflorescences racemes, Inflorescence axillary, Bracts very small, absent or caducous, Flowers zygomorphic, Calyx 5-lobed, Calyx hairy, Petals separate, Corolla papilionaceous, Petals clawed, 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, sp urred, 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 stipitate, Fruit tardily or weakly dehiscent, Fruit oblong or ellipsoidal, Fruit exserted from calyx, Fruit beaked, Fruit glabrous or glabrate, Fruit hairy, Fruit 11-many seeded, Seeds cordiform, mit-shaped, notched at one end, Seed surface smooth, Seeds olive, brown, or black.

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

Astragalus straturensis là một loài thực vật có hoa trong họ Đậu. Loài này được M.E.Jones miêu tả khoa học đầu tiên.