Trees, monoecious. Leaves spirally arranged, paripinnate, 1-8-jugate; Inflorescences axillary, thyrsoid, branched. Flowers unisexual, regular (or zygomorphic). Sepals 5, free, slightly to distinctly unequal, (not) imbricate, not petaloid, outside hairy (or glabrous). Petals 5 (or 4), shorter (or longer) than the sepals, with or without scales or auricles. Stamens 8, (slightly) exserted in male flowers, filaments hairy, anthers glabrous. Ovary at the base 3-celled, higher up 1-celled; Ovules 1 per cell. Fruit 1-celled, 3-winged, indehiscent. Seeds 1 per fruit, without arillode or sarcotesta.
Asia-Tropical:, Borneo ‒ present (Sabah ‒ present); Laos (Laos ‒ present); Thailand (Thailand ‒ present) Burma: present
2 or 3 species in Burma, Laos and Thailand; 1 in Malesia: Borneo (Sabah).