Lianas. Branches and young shoots yellowish pubescent; branchlets tuberculate, very sparse pilose or glabrescent. Leaves 9-13-foliolate; rachis 7-14 cm, including petiole 3-7 cm; leaflet blades obovate-oblong, 5-7 × 2-3.5 cm, membranous, abaxially greenish white when young but glaucous when old, base cuneate to broadly cuneate, apex caudate-acuminate. Cy-mose pseudopanicles 10-15 × 6-8 cm; rachis nodes usually with 3 fascicled flowers at apex of a 8-10 mm branchlet. Pedicel 8-10 mm, slender. Flowers 1.6-1.8 cm. Calyx reddish brown, broadly cup-shaped, 6-7 mm in diam., mouth yellowish pubescent. Corolla rose-red; standard broadly ovate, 1.6-1.7 × ca. 1.2 cm, apex emarginate. Ovary yellowish puberulent on basal part. Legume oblong to ligulate, 4-8 × 1.5-2.5 cm, thin, base attenuate to obtuse, apex acuminate; abaxial suture with a 1-2 mm wide wing, adaxial suture with a 3-4 mm wide wing. Seeds 1-3 per legume. Fl. Apr-May, fr. Jul-Aug.
Forests in mountains; below 700 m. S Guangxi, Hainan.