Description from Flora of China
Climbers, large, with recurved prickles. Bark deep brown. Leaves 12-20 cm; rachis 17-23 cm, with recurved prickles, puberulent or glabrous; pinnae 6-9 pairs, 3-6 cm, with stipuliform prickles in pairs at base; leaflets 7-9 pairs, subsessile, closely spaced, oblong, 6-9 × ca. 3 mm, papery, both surfaces pilose at first, base obliquely rounded, apex obtuse-rounded. Racemes terminal or axillary, ca. as long as or longer than leaves. Pedicels 1.2-2 cm, slender. Receptacle shallowly cup-shaped, glabrescent. Sepals 5, 6-8 mm. Petals yellow, suborbicular, ca. 1 cm, shortly clawed. Filaments slightly exserted, densely villous in lower part, thickened at base. Ovary glabrous. Legume brown, indehiscent, oblong, 3.5-5 × 1.6-2 cm, fleshy, smooth. Seeds 2-4. Fl. Apr-Nov, fr. May-Mar.
Among bushes on mountain slopes, seashores; 200-300 m. Hainan, Yunnan [Bangladesh, Bhutan, Cambodia, India, Indonesia, Laos, Malaysia, Myanmar, Nepal, Sri Lanka, Thailand, Vietnam].