Description from Flora of China
Lianas. Leaves 5- or 7-foliolate; rachis 15-28 cm, including petiole 3-8 cm; leaflet blades ovate-elliptic, ovate-oblong, or elliptic, 3-13 × 1.5-6 cm, thickly papery to thinly leathery, both surfaces glabrous, reticulate veins slightly prominent or obscure, base rounded, apex acuminate to slightly obtuse. Inflorescences and pedicels sparsely yellowish brown hispidulous or densely brownish pubescent. Pseudopanicles axillary, slightly shorter than leaves; rachis nodes with several fascicled flowers on short branchlets. Pedicel 3-5 mm. Flowers 1.2-1.3 cm. Calyx campanulate, 2-3 mm, sparsely pubescent; teeth orbicular to deltoid, short. Corolla whitish, ca. 1 cm; standard obovate-elliptic, claw short. Ovary sessile, whitish villous. Legume oblong to ligulate-oblong, 4-10 × 1.5-2.3 cm, compressed, swollen or not when mature, thinly leathery, glabrous; abaxial suture wing up to 1.5 mm wide, adaxial suture with a 2-3 mm wide wing. Seeds 1-4 per legume. Fl. Mar-May, fr. Jun-Nov.
● Mountain valleys, scrub, sparse to dense forests, mountain slopes, near trails; 500-1600 m. Chongqing, Fujian, Guangdong, Guangxi, Guizhou, Hunan, Jiangxi, Yunnan, Zhejiang.