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Leaves paripinnate; stipules not seen, very early caducous; petiole 4.5–7.2(9) cm long, sparsely to densely pubescent; rachis 16–22.5 cm long,>i> sparsely pubescent;>i> leaflets opposite, in 6–7 pairs,>i> 4.5–11.5 × 2.4–5.2 cm, the distal pair the largest, ovate to ovate-elliptic, slightly asymmetric,>i> apex bluntly acute, base cuneate, sometimes asymmetric, glabrous above, pubescent beneath particularly on the main veins;>i> venation raised on both surfaces>i>.
Petals yellow, c.25 mm in diameter, subcircular, claw c.3 mm long.>i> Stamens 10, filaments glabrous, those of 3 stamens c.25 mm long, of 4 stamens 6–8 mm long, of 3 stamensc.4 mm long; anthers of 7 longer stamens 5 mm long, those of the 3 shortest stamens smaller.>i> Ovary c.35 mm long and 1–2 mm in diameter, filiform, densely sericeous-pubescent, multiovulate; stipe c.4 mm long; stigma terminal, recessed>i>.
Inflorescences terminal, paniculate; axis puberulous;>i> bracts c.8 × 1.5 mm, very narrowly triangular, densely puberulous; bracteoles similar, slightly smaller; bracts and bracteoles persisting until anthesis; pedicel (2)3–3.5 cm long at anthesis.
Pod (according to Brenan) blackish brown, 32–42 cm long, 1–1.5 cm in diameter, subcylindrical, attenuate at apex, somewhat so at base, sparsely pubescent to subglabrous, transversely but not longitudinally partitioned within.
Calyx lobes 5, 8–10 × 4–5 mm, broadly elliptic, densely puberulous outside, shortly puberulous inside.
Branchlets brown, longitudinally ridged when dry, sparsely pubescent, glabrescent.
Shrub or small tree to 8 m (18 m in East Africa) tall.
Seeds brown, c.7 × 6 × 3 mm.
