4. Tephrosia vestita Vogel, Nov. Actorum Acad. Caes. Leop.-Carol. Nat. Cur. 19(Suppl. 1): 15. 1843.
黄灰毛豆 huang hui mao dou
Herbs, perennial, suffrutescent, 1-2 m tall, many branched, yellowish white velutinous. Stems zigzag ascending, ridged. Leaves 7-11(or 13)-foliolate; rachis ca. 10 cm, including petiole 1-1.5 cm; leaflet blades obovate-elliptic to narrowly elliptic, 2-4 × 1-1.8 cm, abaxially velutinous, adaxially rough and glabrous, secondary veins 15-20 on each side of midvein, base cuneate, apex rounded to retuse. Pseudoracemes terminal or opposite leaf near apex of branchlets, 3-7 cm, with congested flowers. Pedicel ca. 2 mm. Flowers ca. 1.7 cm, fragrant. Calyx ca. 3 × 4 mm. Corolla white; standard suborbicular, yellow velutinous. Ovary sericeous, with numerous ovules. Legume linear, 5.5-6 cm × ca. 5 mm, straight, flat, densely yellow velutinous, apex abruptly pointed and with a ca. 1 cm beak. Seeds 10-12 per legume, black, reniform, ca. 3 × 2.5 mm. Fl. Jun-Oct, fr. Jul-Nov.
Sparse woodlands, open places, grasslands. Guangdong, Guangxi, Hainan, Jiangxi [Cambodia, Indonesia, Laos, Malaysia, Papua New Guinea, Philippines, Thailand, Vietnam].