Tree to 30 m high, 90 cm in diameter. Branchlets terete, red-brown, shortly rusty tomentose in the distal parts, often with glandular hairs, glabrescent. Leaves: rachis 6-20.5 cm, scarcely puberulous by patent hairs or shortly tomentose, glands raised, sessile, circular or semiglobose, 1.5-3 mm in diameter; pinnae 1-3 (or 4) pairs, 5-20 cm, scarcely puberulous with patent hairs or shortly tomentose; petiolules 1-4 mm, (patently) puberulous; leaflets (3 or) 4-7 pairs per pinna, opposite, chartaceous, drying dark brown/dark green above and light brown/light green beneath, usually unequal-sided, obovate, elliptic, subtrapezoid, or lanceolate-oblanceolate, 5-17.5 by 1.5-7 cm, base cuneate to asymmetrically half cuneate/half truncate, apex acuminate-caudate, upper surface glabrous with puberulous veins, lower surface glabrous or puberulous, often with reddish glands, midvein usually densely puberulous or hirsute; principal lateral veins 6 or 7 per leaflet-half, non parallel, strongly arching, the lower ones running into the distal half of the leaflet; reticulation dense, prominulous above, prominent beneath Inflorescences terminal or axillary in the distal leaf-axils, rusty tomentose and with glandular hairs, consisting of pedunculate glomerules aggregated into panicles, c. 40 by 40 cm; glomerules consisting of 25 — 30 sessile flowers; floral bracts spathulate, c. 1 mm, sericeous. Flowers pentamerous, bisexual. Calyx tubular or narrowly funnel-shaped, 3.5-5 mm, densely sericeous and with glandular hairs; teeth triangular, acute, 0.5 mm. Corolla narrowly campanulate, (6—)8—11 mm, densely sericeous and with glandular hairs; lobes triangular-ovate, acute, 2-3 mm. Stamens white, c. 15 mm, tube shorter than the corolla-tube. Ovary solitary, glabrous. Pods reddish-orange both outside and within, curved into a semi-to full circle, 6-7 cm in diameter, valves 2-3 cm wide, slightly sinuate, coriaceous, glabrous, with a few prominulous veins, dehiscing first along the ventral suture. Seeds bluish-black, ellipsoid, ± compressed, c. 25 by 10-15 mm.
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A tree. It grows up to 30 m high and can have a trunk 90 cm across. The small branches are round and red-brown. Near the end they have short rusty hairs. The leaves can be 6-20 cm long divided into a compound leaf. There can be 1-3 pairs of first level leaflets 5-20 cm long with secondary leaflets in 4-7 pairs and 5-17 cm long by 2-7 cm wide. (The leaves vary in size and number of leaflets.) The flower clusters are at the ends of branches or in the axils of leaves towards the ends of branches. The flower heads can be 40 cm by 40 cm made up of 25-30 flowers with very short stalks. Flowers have 5 parts and are of both sexes. The fruit are pods which are reddish brown both outside and inside. They are curved almost into a circle which is 6-7 cm across. The pod splits open along one side. The seeds are bluish-black and oval. They are 25 mm by 10-15 mm. They remain attached to the pod.