圆叶舞草 yuan ye wu cao

Hedysarum gyroides Roxburgh ex Link, Enum. Hort. Berol. Alt. 2: 247. 1822; Codoriocalyx conicus Hasskarl; Des­modium gyroides (Roxburgh ex Link) Candolle; D. oxalidi­folium H. Léveillé, p.p.

Shrubs, 1-3 m tall. Stem pubescent when young. Leaves 3-foliolate; petiole 2-2.5 cm; terminal leaflet blade obovate or elliptic, 3.5-5 × 2.5-3 cm, lateral leaflets 1.5-2 × 0.8-1 cm, both surfaces appressed white pubescent, base rounded or cor­date, apex obtuse to rounded or emarginate. Inflorescences 6-15 cm. Pedicel 4-9 mm, densely yellow pubescent. Calyx broadly campanulate, 2-2.5 mm; tube 1.2-1.7 mm; lower lobe broadly triangular, ca. 0.8 mm, upper lobe 2-toothed at apex, ca. 1 mm. Corolla purple; standard broadly obovate, 0.9-1.1 cm × 8.5-10.5 mm; wings 7-9 × 4-6 mm, auriculate, shortly clawed; keel 0.9-1.2 cm, long clawed. Stamens 0.9-1.1 cm. Gynoecium 1.2-1.4 cm; ovary linear, sericeous. Legume falcate, 2.5-5 × 0.4-0.6 cm, long pilose intermixed with dense short hooked hairs, dehiscent along lower suture when mature. Seeds ca. 4 × 2.5 mm. Fl. Sep-Oct, fr. Oct-Nov.

Plains, grassy riverbanks, sparse forests on mountain slopes; 100-1500 m. ?Fujian, Guangdong, Guangxi, ?Guizhou, Hainan, ?Taiwan, S Yunnan [Cambodia, India, Indonesia, Laos, Malaysia, Myanmar, Nepal, New Guinea, Philippines, Sri Lanka, Thailand, Vietnam].