Tree to 30(-50) m, rarely buttressed; d.b.h. to 100 cm. Branchlets slightly angled to terete, glabrous, dark brown, often with transverse fissures when dry. Stipules not seen. Leaves: petiole 1-3 cm, puberulous, glabrescent, with a gland at the junctions of the pinnae, circular to oblong or ob-triangular, sessile, usually sunken in the rachis and with raised margins, c. 4-7 mm; pinnae 1 pair, 2-6.5 cm, puberulous, glabrescent, with a gland at the junction of the distal pair of petiolules, ob-ovate-obtriangular, sunken, with raised margins, 2-3 mm; petiolules 3 mm; leaflets 1-3 pairs per pinna, rigidly chartaceous, opposite, unequal-sided, ovate, elliptic to obovate-elliptic, 5.5—11(—17) by 3.5—5.5(—11) cm, base ± asymmetrically cuneate to rounded, apex obtusely acuminate; both surfaces glabrous except for the sparsely puberulous main vein which is central or subcentral. Inflorescences composed of pedunculate glomerules, on nude branchlets below the leaves or in the upper leaf-axils; peduncles to 2 cm, puberulous, often in fascicles of 4 or 5, aggregated into puberulous short panicles; glomerules consisting of c. 15 flowers. Flowers subsessile, dimorphic, pentamerous, bisexual. Calyx greenish white, subtubular, 2-2.5 mm, sparsely appressed puberulous, often unilaterally divided to the base; teeth inconspicuous, triangular, 0.2 mm. Corolla greenish white, narrowly funnel-shaped, 6-8 mm, glabrous or lobes puberulous at apex; lobes elliptic or elliptic-oblong, acute, 2.5-3 mm. Stamens white, tube equalling the corolla-tube. Ovary sessile, c. 3 mm, glabrous. Pod black or blackish brown, straight or slightly curved, often slightly twisted, rigidly chartaceous-subcoriaceous, flat, sometimes slightly constricted between the seeds, glabrous, c. 18-30 by 3.5-5 cm, indehiscent, valves not conspicuously bullate over the seeds, which are held in separate, externally visible chambers. Seeds brown, often irregular on shape, ovoid to broadly ellipsoid(-obovoid), biconvex, c. 13-16 by 10-14 by 4-5.5 mm; areole horseshoe-shaped, ± symmetrical, to 6 by 1.5 mm, usually reaching beyond the middle of the seed and usually not continuous between the faces of the seed, closed.
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A tree. It grows 30 m tall. The trunk can be 100 cm across.
Can be grown by seedlings. Seeds needs soaking.