Description from Flora of China
Lianas, woody, with tendrils. Twigs slender, glabrous; tendrils solitary, pubescent on one surface. Stipules caducous, lanceolate, small; petiole 1-3 cm, slender; leaf blade broadly orbicular, 2-5 × 2.5-6 cm, papery, abaxially pubescent on veins and near base, adaxially glabrous, veins 7, base cordate, apex bifid to 1/4-1/3 on flowering branches, lobes obtuse at apex. Inflorescence corymbose-racemose, terminal on lateral branches, 5-14 cm with a peduncle 1-4.5 cm; bracts linear-lanceolate, 4-7 mm; bracteoles linear, ca. 4 mm, inserted at middle of pedicel. Pedicel slender. Flower buds ovoid, rusty hirsute. Receptacle 6-9 mm, slender, base swollen on one side and curved at anthesis; calyx lobes 5, reflexed, lanceolate, 4-5 mm, outside pubescent. Petals white, broadly obovate or ovate, spatulate, 8-8.5 mm including a prominent claw 3-4 mm, base cuneate, margin crisped, apex rounded. Fertile stamens 3; filaments ca. 9 mm, glabrous. Staminodes 2-7. Floral disk not fleshy. Ovary shortly stalked, oblique, glabrous; style stout; stigma peltate. Legume strap-shaped or oblong, compressed, 12-15 × 3-3.5 cm, indehiscent, glabrous, reticulate veined, sutures slightly swollen, apex beaked. Seeds 15-18, oblong. Fl. Jun, fr. Jul-Oct.
● Open forests. Guangxi.