Woody climbers with yellow wood, entirely glabrous. Leaves ± elliptic to ovate, base 3(-5)-nerved with the main basal laterals running alongside the midrib for several (-15) mm before curving outwards, with 2-4 pairs of distal lateral nerves. Inflorescences:
Asia-Tropical: Malaya present; Philippines (Philippines present); Sulawesi (Sulawesi present); Sumatera (Sumatera present), Burma present, Nicobar Is present, S. China present present
Two species, one wide-spread in the Nicobar Is., Burma, Indochina, S. China, and Malesia: Sumatra and Malaya to Celebes and the Philippines, the other one endemic in S. China and Indochina.
There has been some confusion about the identity of LOUREIRO'S type species, a matter discussed by FORMAN, l.c.