Tephrosia vicioides Schltdl.

Cracca tenella (A Gray) Rose, Contr U S Nat Herb. 12: 271 1909.
Tephrosia tenella A. Gray, PI. Wright. 2: 36. 1853.
A perennial, with a deep rootstock, stem slender, branched, sparingly strigose or glabrate, angled; leaves 6-10 cm. long; stipules subulate-filiform, 3-5 mm. long; petiole 1-3 cm. long; rachis sparingly strigose; leaflets 7-9, rarely II, or on the lower leaves 3 or 5, linear, acute, 2-4 cm. long, 2-8 mm. wide, glabrous above, sparingly strigose beneath; racemes mostly opposite the leaves, lax, few -flowered, including the peduncle 1-2 dm. long; flowers solitary or two together at each node; bracts subulate; calyx sparingly strigose, the tube 2 mm. long, the lobes lance-subulate, 2 mm. long; corolla about 8 mm. long, similar to that of C. purpurea; pod nearly straight, 3-4.5 cm. long, 4 mm. wide, short-strigose, 6-8-seeded.
Typb locality: San Pedro, Sonora.
Distribution: Texas to Arizona, Lower California, and Chihuahua.

Annual, Perennial, Herbs, Stems woody below, or from woody crown or caudex, 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 sparsely to densely hairy, Stem hairs hispid to villous, Leaves alternate, Leaves petiolate, Stipules inconspicuous, absent, or caducous, S tipules setiform, subulate or acicular, 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 terminal, Inflorescence leaf-opposed, Bracts conspicuously present, 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 ovoid or obovate, Banner petal suborbicular, broadly rounded, Wing petals narrow, oblanceolate to oblong, Wing petals auriculate, 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 flattened, Style sharply bent, Fruit a legume, Fruit unilocular, Fruit freely dehiscent, Fruit elongate, straight, Fruit exserted from caly x, Valves twisting or coiling after dehiscence, Fruit beaked, Fruit hairy, Fruit 3-10 seeded, Seeds ovoid to rounded in outline, Seeds reniform, Seed surface smooth, Seeds olive, brown, or black, Seed surface mottled or patchy.

Tephrosia vicioides là một loài thực vật có hoa trong họ Đậu. Loài này được Schltdl. miêu tả khoa học đầu tiên.