10. Hylodesmum williamsii (H. Ohashi) H. Ohashi & R. R. Mill, Edinburgh J. Bot. 57: 186. 2000.
大苞长柄山蚂蝗 da bao chang bing shan ma huang
Desmodium williamsii H. Ohashi, Ginkgoana 1: 163. 1973; D. williamsii subsp. magnibracteatum H. Ohashi; D. williamsii var. magnibracteatum (H. Ohashi) P. C. Li; Podocarpium williamsii (H. Ohashi) Y. C. Yang & P. H. Huang.
Herbs, perennial, 20-70 cm tall. Stem simple or branched, white pubescent, becoming glabrous. Leaves 3-foliolate; petiole ca. 11 cm; leaflet blade broadly ovate or rhombic, 3-9 × 2.5-6 cm, both surfaces adpressed pubescent, base obtuse-rounded or often cordate, margin entire, apex acute or shortly acuminate. Racemes terminal, 10-40 cm; peduncle densely uncinate pubescent, laxly flowered, 2-4-flowered at each node. Pedicel 1-2 cm. Calyx 3-3.5 mm; lobes longer than tube. Corolla roseate or roseate-purple; standard elliptic or obovate, 1.2-1.6 cm × 7-8 mm, slightly clawed; wings and keel narrowly elliptic, 1.2-1.5 cm × 3-4 mm, shortly clawed, auriculate. Ovary stipitate. Legume 1- or 2-jointed, uncinate pubescent; fruiting pedicel 1-2 cm. Fl. and fr. Aug-Sep. 2n = 22*.
Ditches, grasslands, evergreen forests, limestone soils, thickets; 1400-2700 m. Sichuan, Xizang, Yunnan [Bhutan, India, Nepal].
