和氏豇豆 he shi jiang dou

Dolichos hosei Craib, Bull. Misc. Inform. Kew 1914: 76. 1914; Vigna oligosperma Backer; V. parkeri Baker subsp. acutifoliola Verdcourt.

Perennial herbs, twining or creeping, often forming a thick ground cover. Stipules 2-lobed at base; petiole 2-5 cm; leaflets ovate-elliptic or obliquely ovate, 3-7.5 × 2-5 cm, thinly hairy on both surfaces, base rounded, apex obtuse to acute. Racemes axillary; peduncles 1.5-7 cm; pedicels 1.7-2.2 mm, appressed pubescent. Calyx tube 1.7-2.2 mm; upper teeth connate into a triangular lip of ca. 1.2 mm. Corolla yellow; standard 6-12 mm in diam.; keel not or slightly longer than wings, not beaked. Ovary densely adpressed villous. Legumes black, oblong, 1-2 cm × 4-4.5 mm, hairy, 1-4-seeded.

In grass at roadsides, wastelands; below 500 m. Taiwan [Indo­nesia, Japan (Ryukyu Islands), Malaysia, New Guinea, Sri Lanka; E Africa, Australia, North and South America].