Tendriled liana; stems terete, glabrate to sparsely puberulent. Leaves biternate; petiole and rachis +/- angled and slightly ribbed, usually pubescent at least on upper side; petioles to 6 cm long; leaflets elliptic to ovate, +/- sessile, obtuse to acuminate, acute at base, 3-9 cm long, 2-4 cm broad, crenate above middle (the teeth usually glandular), the surface pellucid-punctate, glabrous but sometimes with short-pubescent veins and usually with axillary tufts on lower surface. Thyrses on solitary racemes borne on tendrils and in leaf axils or densely congested in terminal paniculate racemes; pedicels to 1.5 mm long; flowers white, to ca 4.5 mm long; sepals orbicular to obovate, glabrate to tomentulose outside, pubescent or glabrous inside; petals obovate, the scales of the anterior petals two-thirds the length of petals, subtended by a triangular to oblong, +/- glabrous gland, the crest yellow, glabrous, the appendage villous, the lateral petals with or without subtending glands, their scales lacking crest; stamens 8; filaments flattened, villous; ovary glabrous or villous near apex and on dorsal side of stigmas. Fruits ovate-cordate, glabrous, the cells deeply rugose, 2-3 cm long, the wing reddish. Croat 12421.