Lianas, 2-10 m. Stems densely appressed yellow pubescent when young, glabrescent. Leaves 9- or 11-foliolate; rachis 18-35 cm, including petiole 3-5 cm; leaflet blades ovate-oblong to lanceolate-oblong, 6-10 × 2.5-5 cm with pair at middle of rachis somewhat larger than others, both surfaces appressed pubescent but abaxially more densely so especially on midvein and margin, base truncate to subcordate and asymmetric, apex acute. Racemes terminal, emerged at same time as leaves, ca. 15 × 10 cm, yellow tomentose. Pedicel 2.5-3(-3.5) cm, straight. Flowers ca. 2 cm. Corolla white; standard suborbicular, apex truncate and cuspidate. Ovary with trichomes, with 12 ovules. Legume oblanceolate, flat, yellow tomentose. Seeds brown, round, ca. 1.2 cm in diam. Fl. Apr-Jun, fr. Aug-Sep.