Description from Flora of China
Lianas. Leaves 5- or 7-foliolate; rachis 15-20 cm, including petiole 6-7 cm; leaflet blades obovate-oblong to oblong, 5-10 × 2.5-4.5 cm, subpapery, glabrous, secondary veins 7 or 8 on each side of midvein, slender, and raised on both surfaces, base broadly cuneate to obtuse, apex obtusely acuminate to shortly acuminate. Pseudoracemes axillary, much longer than leaves, without branches or paniculate and with a few branches near base of rachis; rachis nodes with several fascicled flowers on a 4-6 mm branchlet. Pedicel puberulent, 3-6 mm. Flowers 9-10 mm. Calyx campanulate, ca. 3 mm long and wide, puberulent, with numerous minute orange glandular dots. Corolla whitish, 8-9 mm; petals all clawed; standard oblong. Ovary pubescent. Legume oblong, inserted on scarred nodal short branchlets, 5-7.5 × 1.8-2 cm, compressed, finely veined, glabrous, both ends slightly obtuse; abaxial suture with a 2-3 mm wide wing, adaxial suture with a 3.5-5 mm wide wing. Seed 1 per legume. Fl. Jun, fr. Aug.
● Mountain valleys, streamsides. Hainan.