Climbing semi-shrubs, angry roots on nodes;The whole plant is glabrous except the inner surface of corolla.Leaves ovate or ovate-lanceolate, 3-4.5 cm long and 1.5 cm wide, apically acuminate, base cuneate to rounded, lacunar on both surfaces when dry, margin conspicuously recurved;The middle veins are raised, the lateral veins are not obvious;Petiole 5-10 mm long, apical tufted glands inconspicuous.Peduncle several 1 cm longer than leaves;Calyx lobes ovate, obtuse;Corolla ca. 5 mm in diam., inner surface pilose;Accessory corolla lobes ovate, inner horn forming an ovate and obtuse lobe, resting on anther;Pollen mass subobovate, 0.5 mm long.Follicles lanceolate, 5-7 cm long, apex acuminate;Seeds apical with white silk seed coat
