Glabrous. Leaves opposite or subopposite; lamina narrowly ovate to ovate, 5-10 by 1.5-3 cm, attenuate or cuneate at the base to a sometimes obscurely defined petiole up to 20 mm long, acuminate and acute at the apex, dull on both sides or slightly lustrous above; venation pinnate with the midrib and the main laterals distinct on both sides and more prominent below. Inflorescences at the nodes, a many-flowered spike; axis 15-80 mm long, with the flowers inserted in shallow hollows. Flowers probably functionally unisexual but often with vestigial organs of the other sex.
Asia-Tropical: Sulawesi (Sulawesi present); Sumatera (Sumatera present), Nepal to southern China and Taiwan present
Nepal to southern China and Taiwan; Malesia: Sumatra, Celebes, and known from only two collections.