Deciduous trees, up to 20 m high; bole often fluted; bark 10-15 mm thick, reddish-brown, mottled with white, rough, exfoliations irregular; brittle; blaze yellowish with a pink tinge. Leaves bipinnate, alternate, stipulate; stipules small, free, lateral, deciduous; rachis 4-18 cm long, stout, glabrous, pulvinate, with an orbicular gland at tip; pinnae 2, opposite, even pinnate 8-30 cm, slender, glabrous; leaflets 4-18, opposite, estipellate, with a gland between each pair; petiolule 3-5 mm, stout; lamina 5-33.5 x 2.5-6 cm, oblong-acuminate, elliptic or elliptic-oblong, base obtuse or acute, apex acute or acuminate, margin entire, glabrous, coriaceous; lateral nerves 6-12 pairs, pinnate, prominent; intercostal reticulate.

Flowers bisexual, sessile, dull yellow, in axillary globose heads; bracteole club-shaped; calyx 4 mm long, tubular, 5-toothed; petals 5, 1.5 cm long, linear, slightly connate at base, valvate; stamens 10, free, exserted, filaments slender; anthers tipped with a stalked gland which is early deciduous; ovary sessile, style filiform; stigma terminal. 

Fruit a pod 10-15 x 5-6 cm, flat, broadly falcate, woody, compressed, dehiscent, septate between the seeds; seeds 4-10, oblong, compressed, brown, shining.