Lianas, woody, with tendrils. Young branches, petioles, and inflorescences rusty pubescent, later subglabrous. Stipules caducous; petiole 8-17 mm; leaf blade ovate, 3-4 × 2-3 cm, papery, abaxially pubescent on veins and near base, adaxially glabrous, veins 7, base rounded, margin entire or emar­ginate. Inflorescence corymbose-racemose, terminal on lateral branches, 5-7 cm; peduncle short, 5-6 mm. Pedicel 15-20 mm, slender. Flower buds ovoid, ca. 6 mm, apex acute. Receptacle elongate, ca. 15 mm, striped; calyx lobes 5, reflexed, lanceolate, 6-7 mm, adnate from middle downward, upper part rusty pu­bescent outside. Petals white, subrhombic, broadly obovate, or elliptic, abaxially brown crinite from middle downward, claw prominent and 6-8 mm, base cuneate, margin crisped, apex rounded. Fertile stamens 3; filaments 11-12 mm, glabrous. Sta­minodes 7, largest 2 free, ca. 5 mm, others much smaller, joined in a digitate structure. Ovary shortly stalked, glabrous; style ca. as long as ovary, stout; stigma capitate. Legume oblong, 20-25 × 4-4.5 cm, glabrous, indehiscent. Seeds numerous, oblong. Fl. Dec, fr. next Apr-Jun.

● Open habitats on hill slopes; ca. 700 m. Guangxi, Yunnan.