Tree 3-4 m tall, d.b.h. 10 cm. Branchlets terete, dark brown, lenticellate, short-puberulous in the ultimate parts, glabrescent. Leaves: rachis 4-13 cm, puberulous, petiole 2.7-6.5 cm, with a gland, nest-shaped with the orifice pointing acroscopically, 2-5 mm long, 2.5 mm high; pinnae 1 or 2 pairs, 2-20 cm, puberulous; petiolules 4-7 mm, puberulous by semipatent hairs; leaflets (l-)2-4 pairs per pinna, opposite (or subopposite), chartaceous, drying dark red-brown above, olive-green beneath, ± unequal-sided, (ob)ovate-elliptic to elliptic-lanceolate, 5.3-15(~22.5) by 1.4-6.4(-10) cm, base half rounded/half cuneate or broadly cuneate, apex acuminate or subcaudate with ± blunt tip, upper surface glabrous, lower surface with puberulous major veins; principal lateral veins 6-11 per leaf-let-half, upwards arching; reticulation prominent on both surfaces. Inflorescences terminal and axillary in the upper leaf-axils, densely puberulous to sericeous especially in the distal parts, consisting of pedunculate glomerules aggregated into panicles 16-37 cm long; glomerules composed of 4 (sub)-sessile flowers; floral bract ovate, acute, 1 mm long, sericeous. Flowers pentamerous, bisexual. Calyx cup-shaped or campanulate, 3-5 mm, sericeous to tomentose; teeth ± irregular, deltoid, 0.2-0.5(-2) mm. Corolla funnel-shaped, 7.5-12.5 mm, sericeous or hirsute; lobes ovate-elliptic to oblong, acute, 3-4 mm. Stamens 15-20 mm, the tube shorter than the corolla-tube. Ovary solitary, sericeous, sometimes with two free styles. Pod brownish outside, reddish within, straight or curved into a circle, flattened, only slightly sinuate and thickened over the seeds, woody, 12-19 cm long, 2.6-4.5 cm wide, glabrous, with in conspicuous veins, dehiscing along the dorsal suture. Seeds black, ellipsoid, flattened, c. 23 by 16 mm.
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