Deciduous trees, up to 30 m high, bark 10-15 mm, surface grey or greyish-black, rough, deeply vertically cracked, exfoliations small, irregular, fibrous; blaze pink; exudation blood-red. Leaves imparipinnate, alternate; stipules small, lateral, caducous; rachis 6.5-11.1 cm long, slender, pulvinate, glabrous; leaflets 5-7, alternate, estipulate; petiolule 6-10 mm, slender, glabrous; lamina 3.5-12.5 x 2-7 cm, elliptic-oblong, oblong-ovate or oblong, base obtuse or acute, apex obtuse and emarginate, margin entire, glabrous, coriaceous; lateral nerves 9-20 pairs, parallel, prominent, ascending, secondary laterals prominent; intercostal reticulate, prominent.

Flowers bisexual, yellow, in terminal and axillary panicles; 10-12 mm long; bracts small, dioecious; bracteoles 2, caducous; calyx tube campanulate, lobes short, the upper 2 often connate; corolla exserted; petals 5, all long-clawed, crisped along the margins; standard orbicular, wings oblique, obovate, auricled; keel petals oblique, small, slightly connate; stamens 10, monadelphous; filaments subequal; anthers uniform; ovary shortly stalked, inferior, tomentose, 1-celled, ovules 2; style filiform, incurved, beardless; stigma capitate. Fruit: a pod, 2.5-5 cm across, orbicular-reniform, broadly winged; seed one, subreniform.