Climbers. Branchlets lenticellate; Leaves opposite; Inflorescence terminal or axillary, cymose, shorter than subtending leaves. Flowers 5-merous, actinomorphic. Sepals with colleters in the axils. Stamens slightly exserted from the corolla tube, attached in a ring to the style head; Fruit of paired follicles; Seeds long narrow linear;
Asia-Tropical: Borneo present; Malaya (Peninsular Malaysia present); Sumatera (Sumatera present)
1 species in Sumatra, Peninsular Malaysia, Borneo.