Trees, monoecious. Indumentum of solitary simple hairs, no glands. Twigs terete. Leaves spirally arranged, paripinnate, 1-8-jugate; pseudo-stipules absent; neither petiole nor rachis winged. Leaflets opposite to alternate, margin entire. 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. Disc entire (or interrupted), glabrous. Stamens 8, (slightly) exserted in male flowers, filaments hairy, anthers glabrous. Ovary at the base 3-celled, higher up 1-celled; style 3-lined or 3-lobed. Ovules 1 per cell. Fruit 1-celled, 3-winged, indehiscent. Seeds 1 per fruit, without arillode or sarcotesta.
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