Tree, monoecious. Leaves paripinnate. 3-7-jugate, without pseudo-stipules, neither petiole nor rachis winged. Inflorescences terminal and in the upper leaf-axils, thyrsoid; Flowers actinomorphic, unisexual, male and female in the same inflorescences. Sepals 5, free, imbricate, outer 2 slightly smaller, the inner more or less petaloid towards the margin, outside and inside densely appressedly short-hairy. Petals absent. Stamens 8 or 9, exserted in male flowers; Ovary short-stipitate, smooth, densely fulvous-pilose, 3-locular, tapering into the terminal style; Fruit indehiscent, sessile or stipitate, trigonous-ellipsoid to -globular, slightly grooved, winged; Seeds glabrous, without arillode, not winged.