Tree. Leaves spiral, penninerved; Petals (3-) 4 (-5), free to almost the base. Stamens generally 2, rarely 1 or 3 before each petal and adherent to its base; Ovary superior, incompletely (2-) 3 (-4)-celled below, 1-celled above; Seed 1, mainly containing starch, and very little fatty substances in the form of oil-droplets;
Asia-Tropical: Borneo present; Malaya (Peninsular Malaysia present); Sumatera (Sumatera present), Banka present
Monotypic, endemic in Malesia: Sumatra, Banka, Malay Peninsula, and Borneo. .