21. Desmodium renifolium (Linnaeus) Schindler, Repert. Spec. Nov. Regni Veg. 22: 262. 1926.
肾叶山蚂蝗 shen ye shan ma huang
Hedysarum renifolium Linnaeus, Syst. Nat., ed. 10, 2: 1169. 1759; Desmodium reniforme Candolle; H. reniforme Linnaeus, nom. illeg. superfl.
Subshrubs, 30-50 cm tall, much branched, often glabrous. Leaves 1-foliolate; petiole 1-2 cm; blade reniform or compressed rhombic, often broader than long, 1.5-3.5 × 2.5-5 cm, lateral veins 3 or 4, both ends truncate or base broadly cuneate or apex emarginate. Panicles terminal or racemes axillary, 5-15 cm, laxly flowered, 2-5-flowered at each node. Pedicel 2-8 mm, elongated to 1.3 cm at fruiting. Calyx 4-lobed; lobes triangular, ca. as long as tube. Corolla white to pale yellow or purple, ca. 5 mm; standard obovate, base broadly shortly clawed, apex slightly emarginate; wings narrowly oblong, long clawed; keel narrowly elliptic, long clawed. Stamens monadelphous, 3.2-4.2 mm. Ovary adpressed puberulent. Legume narrowly oblong, 2-3 × 0.25-0.4 cm, puberulent, becoming glabrescent, lower suture deeply or slightly constricted, upper suture straight or slightly constricted, 2-5-jointed. Fl. and fr. Sep-Nov.
Sunny grasslands, thickets, forest margins, broad-leaved forests; 100-1000 m. Hainan, Taiwan, S Yunnan [Cambodia, India, Indonesia, Laos, Malaysia, Myanmar, Nepal, Thailand, Vietnam; Australia].