Astragalus piutensis R. Barneby & D. J. Mabberley

Xylophacos marianus Rydb. Bull. Torrey Club 52: 233. 1925
A subacaulescent perennial, with a cespitose caudex; stems 1-3 dm. long; leaves 3-7 cm. long, with a slender rachis; stipules ovate or deltoid, 2-4 mm. long; leaflets 11-19, oval, obovate, or broadly elliptic, mostly obtuse, 3-8 mm. long, gray ish-strigose ; peduncles 2-4 cm. long; racemes 2-6-flowered; bracts lanceolate, 3 mm. long; calyx villous, the tube 8-10 mm. long, the teeth subulate, 3 mm. long; corolla about 2 cm., rarely 2.5 cm. long, apparently only purple-tinged; banner obovate, slightly arcuate; wings shorter, the blades oblong, with a broad auricle; keel-petals still shorter, the blade broadly lunate, rounded at the apex; pod lance-ovoid, 15-18 mm. long, 8 mm. wide and thick, moderately arcuate throughout, villous but not densely so.
Type locality: Marysvale, Utah. Distribution: Central Utah.

Perennial, Herbs, Stems woody below, or from woody crown or caudex, Taproot present, Nodules present, Stems very short, acaulescent or subacaulescent, Stems prostrate, trailing, or mat forming, Stems less than 1 m tall, Stems solid, Stems or young twigs sparsely 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 10-many, Leaves hairy on one or both surfaces, Flowers in axillary clusters or few-floweredracemes, 2-6 flowers, Inflorescences racemes, Inflorescence axillary, Bracts very small, absent or caducous, Flowers zygomorphic, Calyx 5-lobed, Calyx hairy, 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, 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 unilocular, Fruit humistrate, lying on the ground, Fruit tardily or weakly dehiscent, Fruit oblong or ellipsoidal, Fruit fleshy, 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 marianus adalah spesies tumbuhan yang tergolong ke dalam famili Fabaceae. Spesies ini juga merupakan bagian dari ordo Fabales. Spesies Astragalus marianus sendiri merupakan bagian dari genus Astragalus. Nama ilmiah dari spesies ini pertama kali diterbitkan oleh (Rydb.) Barneby.

Astragalus piutensis adalah spesies tumbuhan yang tergolong ke dalam famili Fabaceae. Spesies ini juga merupakan bagian dari ordo Fabales. Spesies Astragalus piutensis sendiri merupakan bagian dari genus Astragalus. Nama ilmiah dari spesies ini pertama kali diterbitkan oleh Barneby & Mabb..

Astragalus piutensis là một loài thực vật có hoa trong họ Đậu. Loài này được Barneby & Mabb. miêu tả khoa học đầu tiên.