Small tree to 8 m high; branchlets terete, glabrous. Stipules deltoid, acute, c. 1 mm. Leaves: rachis 8-14 cm, puberulous, petiole 2.5-3.5 cm, glands c. 1 mm below the proximal pair of pinnae and at the three proximal pairs of pinnae, or absent; lower gland crater-shaped, hollow, up to 9 by 5 mm; distal glands narrowly urceolate, hollow, 1.5-3.5 mm in diameter, 2-4 mm high; pinnae 5-9 pairs, 5-15 cm, puberulous adaxially; leaflets (13-)20-31 pairs per pinna, asymmetrically oblong, (3—)7—15 by 1.5-4 mm, base asymmetrically cuneate/truncate, apex rounded, glabrous on both surfaces, margins ciliate, main vein closer to but not parallel to the front margin, 1 (or 2) accessory veins arching from the base towards the back margin. Inflorescence consisting of pedunculate glomerules aggregated into terminal racemes, 16->25 cm long, faintly appressed-puberulous; peduncles 1.5-1.7 cm; glomerules of c. 40 flowers, each flower subtended by a 1-1.5 mm long, spathu-late bract. Calyx funnel-shaped, glabrous; lobes broadly deltoid, somewhat unequal, obtuse, c. 2 mm long. Petals oblanceolate, acute, glabrous, c. 2 mm long. Stamens 10, filaments c. 4.5 mm long, anthers with a stipitate globular gland c. 0.05 mm in diameter at the apex of the connective. Ovary subsessile, glabrous, stipe c. 1.3 mm long. Pod dark brown, straight, oblong with parallel margins, chartaceous, up to 8.6 by 1.6 cm, valves with reticulate veins, glabrous, indehiscent. Seeds obovate-elliptic, flat, c. 4.2 by 2.5 mm; areole 2.8 by 1.3 mm, with pleurogram parallel to the margin and open towards the hilum.
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