Tall trees. Stipulesl Leaves alternate, imparipinnate, often 5-foliolate. Leaflets alternate or sometimes opposite, petiolulate. Inflorescences axillary, paniculate; bracts and bracteoles very small, caducous; bracteoles 2, enclosing young flower bud. Flowers bisexual, slightly zygomorphic, pedicelled. Hypanthium absent. Calyx lobes 5, almost free. Petals 5, erect-patent, clawed, with the 2 lateral (outermost) ones larger. Disk absent. Stamens 7-9 (4 or 5 fertile, 2-4 staminodes), unequal, free; anthers basifixed, bent inward horizontally, apex slightly projecting, dehiscing by terminal pores or short slits. Ovary sessile, flattened, 3-5-ovuled; style slightly incurved; stigma terminal, obscure. Pods oblong, flattened, narrowly winged along the ventral suture, dehiscent, valves thin-coriaceous, 1-3-seeded. Seeds flat, disk-like; cotyledons flat.
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