Large trees, ultimate shoots not divaricate. Leaves glabrous on both surfaces with minute papillae on veins giving a beaded appearance. Stipules to 7 mm long, foliaceous, persistent, lanceolate to ovate. Inflorescence an unbranched or little-branched terminal or axillary raceme with shortly stalked congested cymules proximally and singly inserted flowers distally. Flowers hermaphrodite, strongly zygomorphic. Petals 5, unequal in size and shape, the 2 posterior larger than the others, markedly ungulate and enclosing stamens in bud. Stamens 8-30, inserted unilaterally on margin of disk; Ovary inserted laterally at mouth of receptacle; Fruit large, hard;
Asia-Tropical: Borneo present; Malaya (Peninsular Malaysia present); Philippines (Philippines present); Sulawesi (Sulawesi present); Sumatera (Sumatera present), Mindanao present
Malesia: Malay Peninsula, Sumatra, Borneo, Sulawesi, Philippines (Mindanao); 2 species.