Astragalus episcopus S. Wats.

Lonchophaca kaibensis (M. E. Jones) Rydberg
Astragalus kaibensis M. E. Jones, Contr. W. Bot. 10: 64. 1902.
A perennial, with a rootstock; stem flexuous, branched, sparingly strigose, 3-5 dm. high, rush-like, striate; leaves 3-6 cm. long, the terminal leaflet not differentiated from the rachis; stipules deltoid, 3 mm. long, caducous; lateral leaflets 0-4, linear, strigose, 3-8 mm. long, involute; racemes including the peduncle 1.5-2 dm. long, lax; bracts deltoid, 2 mm. long; pedicels 2 mm. long; calyx white-strigose, the tube 5 mm. long, 2 mm. broad, the teeth deltoid, 1 mm. long; corolla white; banner obovate, 12 mm. long; wings slightly shorter, the blade oblanceolate, with a basal auricle; keel-petals about 11 mm. long, the blade obliquely lunate, rounded at the apex; pod elliptic-oblong, acute at each end, 2-2.5 cm. long, 5-6 mm. wide, glabrous, the cross-section transversely elliptic or oval.
Type locality: House Rock, Lee's Ferry, Arizona. Distribution: Known only from the type locality.

Homalobus episcopus (S. Wats.) Rydb. Bull. Torrey
Club 40: 53. 1913.
Astragalus Episcopus S. Wats. Proc Am. Acad. 10: 346. 1875. Tragacantha Episcopus Kuntze, Rev. Gen. 944. 1891.
A perennial; stem glabrate below, strigose above, 4—6 dm. high, erect or ascending; stipules 4—6 mm. long, deltoid; leaves 5-10 cm. long; leaflets 1—3 pairs, narrowly linear, strigosecanescent, 1 cm. long or less, the terminal one represented by the elongation of the rachis; peduncles 8-10 cm. long, strigose; racemes 4-6 cm. long, 4— 10-flowered; bracts subulate; calyx strigose, the tube deeply campanulate, 4 mm. long, the teeth subulate, 1-1.5 mm. long; corolla probably yellowish; banner obovate, 12-15 mm. long; wings shorter, the keel-petals about 1 cm. long, rounded at the apex; pod glabrous, 2.5-3 cm. long, 6 mm. wide, tapering at both ends, with a very short stipe.
Type locality: Southern Utah.
Distribution: Known only from the type locality.

Perennial, Herbs, Stems woody below, or from woody crown or caudex, Plants with rhizomes or suckers, Taproot present, Nodules present, Stems erect or ascending, Stems less than 1 m tall, Stems solid, Stems or young twigs sparsely to densely hairy, Leaves alternate, Leaves petiolate, Stipules conspicuous, Stipules membranous or chartaceous, Stipules persistent, Stipules free, Leaves simple, or appearing so, Leaves compound, Leaves odd pinnate, Leaf or leaflet margins entire, Leaflets opposite, Leaflets 2, Lea flets 3, Leaflets 4, Leaflets 5-9, Leaves hairy on one or both surfaces, Leaves reduced to phyllodia, Flowers in axillary clusters or few-floweredracemes, 2-6 flowers, 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 white, 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 tardily or weakly dehiscent, Fruit oblong or ellipsoidal, Fruit or valves persistent on stem, Fruit exserted from calyx, Fruit beaked, Fruit glabrous or glabrate, Fruit hairy, Fruit 3-10 seeded, Fruit 11-many seeded, Seeds cordiform, mit-shaped, notched at one end, Seed surface smooth, Seeds olive, brown, or black.

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

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