三裂叶豇豆 san lie ye jiang dou

Dolichos trilobatus Linnaeus, Mant. Pl. 1: 101. 1767; Pha­seolus trilobatus (Linnaeus) Schreber.

Perennial or annual trailing herbs. Stems 30-60 cm, gla­brous or glabrescent. Stipules peltate, ovate, 0.6-1.9 cm; petiole 5-10 cm; leaflets rhombic or ovate, 2.5-5 cm, in annual cul­tivated forms often shallowly 3-lobed, in perennial wild forms often deeply 3-lobed, medium lobe broadly spatulate, apex ob­tuse, glabrous or inconspicuously pubescent. Racemes axil­lary, headlike; peduncles longer than leaves; pedicels very short. Calyx campanulate; teeth deltoid, ca. 2 mm. Corolla yellow, ca. 6 mm; standard cordate; wings obovate, auriculate; keel apex contorted. Legumes cylindric, 3-4 cm × 3-4 mm, glabrescent, 6-12-seeded. Seeds deep brown, cylindric, very small, truncate at both ends.

Grasslands; ca. 1000 m. Taiwan, Yunnan [Afghanistan, Bangla­desh, Bhutan, India, Indonesia, Kashmir, Myanmar, Nepal, Pakistan, Sri Lanka, Vietnam].