Astragalus lotiflorus Hook.

Batidophaca nebraskensis (Bates) Rydberg
Astragalus lotiflorus nebraskensis Bates, Am. Nat. 29: 670. 1895. Astragalus nebraskensis Bates, Torreya 5: 216. 1906.
A perennial, with a deep root and cespitose caudex; stems branched at the base, less than 1 dm. high; stipules hirsute, deltoid, 4—5 mm. long; leaves 5-7 cm. long, erect; leaflets oblong or elliptic, 1-2 cm. long, 4—6 mm. wide, hirsute on both sides; flowers 1-3 in the axils; peduncle nearly obsolete (peduncled racemes like those of P. lotiflora and P. cretacea not seen); calyx hirsute, the tube 3 mm. long, the lobes subulate, about 3 mm. long; corolla ochroleucous, like that of P. lotiflora; pod lance-ovoid, about 2 cm. long and 8 mm. wide, densely hirsute.
Type locality: Long Pine, Nebraska. Distribution: Nebraska and South Dakota.

Batidophaca lotiflora (Hook.) Rydberg
Astragalus lotifiorus Hook. Fl. Bor. Am. 1: 152. 1831.
Phaca lotiflora T. & G. Fl. N. Am. 1 : 349. 1838.
Astragalus lotiflorus pedunculosus A. Gray, Proc. Am. Acad. 6: 209. 1864.
Tragacantha lotiflora Kuntze. Rev. Gen. 946. 1891.
Astragalus lotiflorus elatiocarpus Rvdb. Mem. N. Y. Bot. Gard. 1: 244, in part. 1900.
Cystopora lotiflora Lunell. Am. Midi. Nat. 4: 428. 1916.
A perennial, but apparently blooming the first season, with a deep, at first rather slender taproot, in age crowned with a cespitose caudex; stems branched at the base, 2-10 cm. high, densely covered with the pubescent deltoid stipules; leaves 4—10 cm. long, canescent with ascending hairs; leaflets 9-13, or on the earlier leaves fewer, silky-canescent, oblong or elliptic, 5-15 mm. long; flowers usually of two kinds, the earlier in short racemes on elongate peduncles, the later (or in seedling plants often all) subsessile or short-peduncled in the axils; peduncles of the earlier flowers 3-10 cm. long; racemes 4-1 2-flowered; calyx silky-pilose, the tube about 3 mm. long, the lobes subulate, 3.5-4 mm. long; corolla ochroleucous oi sulphur-yellow, 8-9 mm. long; later flowers usually setting fruit without fully opening; calyx-lobes shorter, 3 mm. long or less; fruit semi-ovoid, lunate, upcurved towards the apex, acute at each end, 15-18 mm. long, 7-8 mm. wide, villous with short hairs, the upper suture prominent; seeds obliquely round-reniform.
Type locality': Carlton House on the Saskatchewan. Distribution: Plains, Saskatchewan to Nebraska and Colorado.

Annual, Perennial, Herbs, 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 glabrous or sparsely glabrate, 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, Inflorescences globose heads, capitate or subcapitate, Inflorescence axillary, Bracts very small, absent or caducous, Flowers zygomorphic, Calyx 5-lobed, Calyx hairy, Petals separate, Corolla papilionaceous, Petals clawed, Petals greenish yellow, 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 diadelphou s, 9 united, 1 free, Filaments glabrous, Style terete, Style persistent in fruit, Fruit a legume, Fruit unilocular, Fruit freely dehiscent, Fruit tardily or weakly dehiscent, Fruit elongate, straight, Fruit oblong or ellipsoidal, Fruit exserted from calyx, Fruit beaked, Fruit glabrous or glabrate, Fruit 11-many seeded, Seeds cordiform, mit-shaped, notched at one end, Seed surface smooth, Seeds olive, brown, or black.

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

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