Glabrous. Leaves opposite, sometimes seemingly superposed; lamina ovate, 20-30 (-50) by 7-10(-19) cm, truncate to cordate at the base, subsessile or with a petiole to 2 mm long, often bullate between the veins, acuminate and acute at the apex, lustrous above, dull below; venation pinnate with the midrib and the main laterals distinct on both sides. Inflorescences at the nodes and on the epicortical runners, a raceme of 2-6 opposite crowded pairs of flowers; axis 5-10 mm long, subtended at the base by an involucre of broad short bracts; pedicels 1-2 mm long; bracts erect, acuminate, 3-5 mm long.
Asia-Tropical: Malaya (Peninsular Malaysia present), Mindanao present, northern Borneo present
Malesia: Peninsular Malaysia, northern Borneo, Mindanao.