Description from Flora of China
Shrubs, usually 1-3 m tall. Branches glabrescent. Leaves 3-foliolate; petiole 0.5-2 cm; terminal leaflet blade oblong or oblong-lanceolate, 2-5 × 0.9-1.9 cm, lateral leaflets smaller, abaxially appressed pubescent, adaxially glabrous, lateral veins 4-7 on each side of midvein, not reaching margin, both ends obtuse or acute. Inflorescences subumbellate, 1-1.5 cm, ca. 10-flowered. Pedicel ca. 2 mm, densely appressed pubescent. Calyx ca. 4 mm; upper lobe broader, other lobes narrower. Corolla white or pale yellow; standard elliptic, 6-9 × 5-6 mm, clawed; wings narrowly oblong, 5-6 × 1.5-2 mm; keel nearly falcate, 7-9 × ca. 2.5 mm. Stamens 7-8 mm. Pistil 7-8 mm; ovary pilose; style ca. 7 mm. Legume broadly elliptic or nearly orbicular, 4-10 × 3-7 mm, sessile, 1-jointed, glabrous, distinctly reticulate veined. Seed broadly elliptic, ca. 3 × 2 mm. Fl. May-Aug, fr. Sep-Nov.
Grassy riverbanks, thickets or sparse forests on mountain slopes; 100-800 m. Fujian, Hainan [Cambodia, Laos, Thailand, Vietnam].