Twiner. Leaf blade 15-65 mm long. Corolla with very minute puberulence on inner face. Peduncle bearing 1 terminal umbel only. Bracts 2-8 mm long, very conspicuous, forming a kind of involucre. Flowers white, cream, greenish yellow or light yellow.
Herbaceous climber to 10 m, with woody base; sap clear. Leaves opposite, ovate-lanceolate. Flowers greenish, inflorescence bracts 2-8 mm long, forming an involucre around pedicel bases.