Japan Flora: Glabrous prickly climber; leaves 20-30 cm. long, the leaflets 4-6 on each pinna, deep green and lustrous on upper side, glaucous beneath, with slightly raised veinlets on both sides; flowers 15-20 mm. across; legumes about 5 cm. long.
Kyushu (Yakushima). India, Malay Peninsula, Formosa, China, and Ryukyus.