1. Tephrosia vogelii J. D. Hooker in Hooker, Niger Fl. 296. 1849.
西非灰毛豆 xi fei hui mao dou
Herbs, perennial, erect, many branched. Stems tomentose with short and long white and yellow trichomes, trichomes ca. 1.5 mm. Leaves 13-29-foliolate; rachis 10-25 cm, including petiole 1-3 cm; leaflet blades oblong-elliptic to lanceolate-elliptic, 3-7 × 0.9-1.8 cm, abaxially densely mixed white and yellow tomentose, adaxially appressed white sericeous, secondary veins 12-15 on each side of midvein. Pseudoracemes terminal or axillary near apex of branchlets, 10-15 cm, rusty tomentose, long pedunculate. Pedicel 2-2.3 cm, rusty villous. Flowers ca. 2.5 cm. Calyx ca. 1.2 × 1 cm, brown tomentose; teeth oblong, ca. 1 cm, apex rounded but adaxial one narrowly acute. Corolla white or occasionally violet; standard orbicular, sericeous. Ovary sericeous, with numerous ovules. Legume linear, 10-13 cm × 12-14 mm, straight, yellowish white tomentose, rusty on suture, apex beaked. Seeds 12-16 per legume, black, broadly ovoid, ca. 7 × 4.5 mm, smooth. Fl. and fr. year-round. 2n = 22.
Cultivated in S Guangdong, Hainan, and Taiwan [native to tropical Africa].
This species is grown as a green mulch.