Trees, to 30 m tall. Branchlets brown, pubescent when young. Leaf rachis 30-60 cm; petiolar gland broadly elliptic, 4-6 mm; pinnae (11-)15-20 pairs, pinna rachis 10-15 cm, fulvous pubescent; leaflets sessile, 28-56 pairs, linear-falcate, 10-14 × 3-4.2 mm, rigidly leathery, both surfaces glabrous except ciliate along margin, lateral veins prominent abaxially, base subtruncate, unilaterally slightly auriculate, apex obliquely acute. Heads with peduncles 30-45 cm, several together racemiform. Flowers yellow. Calyx 8-10 mm; lobes orbicular, yellow tomentose. Corolla tubular, 10.5-11.5 mm; lobes ca. 1.5 mm, oblong, acute. Staminal tube 9-9.5 mm; anthers 1-1.5 mm. Ovary stipitate. Legume black, slightly torulose, (15-)30-45 × ca. 3 cm, glabrous, shiny, base attenuate into a stipe 12-22 cm, apex rounded. Seeds obliquely arranged, 6-15. Fl. Mar, fr. Sep-Nov.
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A tree. It grows 35 m high. It loses its leaves during the year. The bark is red brown. It has small buttresses. The leaves are 30-60 cm long. They are twice divided. There are 14-20 pairs of side branches. The larger ones can have 30-45 pairs of leaflets. These are 1,5 mm long by 4 mm wide. They are pointed at both ends. The flowers are creamy white. They are in round heads on long stalks. These are 30-40 cm long. The fruit are strap shaped and 30-45 cm long. They are clumped together on a lumpy swelling. They are bright green when young but turn black and shiny when mature. The seeds are arranged horizontally across the pod. The pod splits open but does not curl back.
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