毛鱼藤 mao yu teng

Pongamia elliptica Wallich, Pl. Asiat. Rar. 3: 20. 1832; Derris elliptica (Roxburgh) Bentham; Galedupa elliptica (Wal­lich) Roxburgh.

Lianas, 7-10 m, robust. Young branchlets, leaf rachises, petioles, and petiolules densely brown pubescent. Branches gla­brous when old, scattered with brown lenticels. Leaves 9-13-foliolate; rachis 20-35 cm, including petiole 4-8 cm; leaflet blades oblong, obovate-oblong, or oblanceolate, 6-15 × 2-4 cm, thickly papery, abaxially greenish white and finely brown sericeous, adaxially glabrous or only pubescent along veins, base cuneate to broadly cuneate, apex shortly obtusely acumi­nate. Pseudoracemes axillary, 15-25 cm, rachis densely pubes­cent; rachis nodes with 3 or 4 flowers fascicled on short branch­lets; peduncle 8-12 cm or much longer, densely pubescent. Pedicel 6-8 mm, densely pubescent. Flowers ca. 2 cm. Calyx shallowly cup-shaped, ca. 4 × 6-7 mm, densely sericeous. Corolla pink to whitish, 1.5-1.8 cm; standard suborbicular, 1.2-1.5 cm wide, outside brown pubescent, apex emarginate. Ovary densely pubescent. Legume oblong, 3.5-8 × 1.7-2 cm, com­pressed, pubescent when young, glabrescent; abaxial suture with a ca. 0.5 mm wide wing, adaxial suture with a ca. 2 mm wide wing. Seeds 1-4 per legume. Fl. Apr-May, fr. Jun.

Cultivated in Guangdong, Guangxi, Hainan, Taiwan, and Yunnan [native to Cambodia, India, Indonesia, Laos, Malaysia, Philippines, Thailand, and Vietnam].

This species is cultivated for use as an insecticide.