Climbers or scramblers; Leaves opposite; Inflorescence a terminal and/or axillary cyme, lax. Flowers 5-merous, actinomorphic, small. Sepals free, colleters in a row at the base inside. Stamens completely included within the corolla tube, attached at the insertion of the filament into the anthers in a ring to the style head; Fruit of 2 parallel or slightly divergent follicles; Seeds linear;
Asia-Tropical: Borneo present; Sumatera (Sumatera present)
1 species in Sumatra and Borneo.