Trees medium-sized, monoecious. Leaves spirally arranged, paripennate, 3-7-jugate, without pseudo-stipules, glabrous, neither petiole nor rachis winged. Inflorescences terminal or pseudo-terminal, cymules many-flowered, bracts inconspicuous. Flowers unisexual, regular. Petals 5, included in the calyx, hardly clawed, sericeous on both sides, the margin sometimes slightly inflexed just above the base but without a clear scale. Stamens 5 (or 6), hardly exserted; Fruits 2-parted, the parts obovoid, loculicidal, glabrous, densely aculeate, pericarp coriaceous, glabrous inside. Seeds attached basally, up to about halfway enveloped by a thin-fleshy ± entire arillode, hilum large, nearly orbicular.