Unarmed trees. Leaves bipinnate, eglandular; pinnae each with few to many alternate leaflets. Inflorescences of axillary, solitary or rarely paired racemes. Flowers hermaphrodite. Calyx gamosepalous, with 5 teeth. Petals 5, free. Stamens 10, fertile; anthers with a caducous apical gland. Pods straight or slightly curved, oblong, woody, indehiscent, the valves with a thick wing-like projection arising from the middle of the valve and running longitudinally for the whole length of the latter, the pod in section thus ± cruciform, internally septate between the seeds. Seeds hard, dark brown, unwinged.
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