Tree 6-20 m high, to 50 cm in diameter; bark grey or dark brown. Branchlets terete, slightly ridged by decurrent ridges from the leaf-scars, densely rusty tomentose. Stipules linear to filiform, acute, 1-3.5 mm. Leaves: rachis 2-16 cm, densely rusty tomentose, petiole 2-7 cm, with a gland at or below the middle, 1.3-3.3 cm above the base, circular, flat to concave, sessile, 0.8-1.5 mm in diameter; pinnae (l-)2-3(-4) pairs, densely rusty tomentose, (2.5-)3-13.3 cm; leaflets 3-5(-7) pairs per pinna, alternate, petiolulate, chartaceous, drying green, unequal-sided, either asymmetrically ovate, obovate, elliptic, ovate-rhomboid, or subtrapezoid(-lanceolate), (l-)2-8.4 by (0.3-)0.7-4.2 cm, base asymmetrically cuneate or half cuneate/half rounded, apex rounded to acuminate or obtuse, both surfaces puberulous or subglabrous; main vein central or subcentral, lateral veins numerous, prominent, reticulate. Inflorescences: peduncles 4-9 cm, densely rusty tomentose; pedicels c. 4-5 mm; bracts oblong, spathulate, concave, c. 1 mm. Flowers: calyx green, cup-shaped, 1-1.5 mm, ± densely appressed puberulous or sericeous; teeth triangular, acute, 0.1-0.5 mm. Corolla yellowish green, tubular, slightly widened in the distal part, 5.5-6.5 mm, ap-pressed-puberulous or sericeous; lobes triangular-ovate, acute, 0.5-1 (-2) mm. Stamens 12 mm; white or cream, turning orange; tube 4-5.5 mm, at base shortly united with the corolla-tube, ± equalling the corolla-tube. Ovary 1-2.5 mm, glabrous, stipe 2-4 mm. Pods yellowish to brown outside, reddish inside, forming a circle, 4-5 cm in diameter, chartaceous, valves puberulous or densely pilose, 1.1-1.7 cm wide, ± sinuate between the seeds. Seeds glossy black, ellipsoid, obovate or subglobose 4-8 by 3-4.5 mm, areole with pleurogram parallel to and c. 1 mm from the margin, open towards the hilum; funicle thick, twice contorted.
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