Liana, branchlets pubescent or glabrous, spiny. Leaves alternate or sometimes subopposite, papyraceous, petiolate, petiole 2-5 mm. long, pubescent to tomentose, persistent and somewhat accrescent forming a spine, lamina elliptic to broadly elliptic, 5-14 X 3-7.5 cm., pubescent, especially on the nerves beneath, or nearly glabrous, often with hairy domatia in the axils of the nerves beneath, bluntly acuminate at the apex, blunt, rounded or subcordate at the base. Flowers white, subsessile or shortly pedicellate, 5-merous, in large terminal panicles, often with reduced leaves at the points of branching, rhachis tomentose, pubescent or glabrous. Lower receptacle about 1 mm. long, glabrous, nearly glabrous or loosely patent-pubescent, usually somewhat constricted at the apex and often with a short pedicel up to about 0.5 mm. long; upper receptacle campanulate to cupuliform, 2.5-3 X 1.5-2 mm., glabrous. Calyx-lobes 5, broadly deltoid, about 0.5 mm. long. Petals 5, obovate or obovate-elliptic, 2-3 X 1.5-1 mm., hairy. Stamens 10, filaments 3-5 mm. long, anthers 0.4 mm. long. Disk small, fleshy, glabrous, surrounding the base of the style. Style about 4 mm. long. Fruit suborbicular in outline, 1.5 cm. in diam., usually glabrous, 5-winged, wings thin, flexible, 5-6 mm. broad.
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