Tree to 45 m high, bole to 31 m high and to 160 cm in diameter, sometimes buttressed at the base. Branchlets terete, brownish, in the ultimate parts tomentose, glabrescent, dotted by numerous light brown lenticels. Stipules not seen. Leaves: rachis (1.5-)6-13 cm, sulcate in the distal part and there puberulous; petiole (0.7-)1.7-5.5 cm, with glands at the junctions of the pinnae, elliptic to circular, raised, convex, 1-1.5 mm in diameter; pinnae 2-3 pairs, sulcate, faintly puberulous, glabrescent, (2-)3.5-10.5 cm, leaflets 3-6 pairs per pinna, rigidly chartaceous, petiolulate, ovate-ellip-tic, elliptic, obovate-elliptic or lanceolate-subtrape-zoid, unequal-sided, 1.2-8 by (0.7-) 1-4.2 cm, base symmetrically or asymmetrically cuneate, apex obtuse, shortly acuminate; main vein ± central, lateral veins prominulous above, prominent and reticulate beneath; both surfaces glabrous or main vein puberulous. Inflorescence: racemes solitary or paired, (7-) 10-23 cm, including the 5-16 cm long peduncle, pedicels 0.6-1.2 cm, bracts triangular, c. 2 mm. Flowers: calyx rusty brown, cup-shaped, (2-)3-5 mm, shortly tomentellous, margin inconspicuously toothed. Corolla light brown outside, white inside, funnel-shaped, (7.5-) 12—16.5(—19) mm, densely tomentose, lobes triangular, ovate, or ovate-oblong, acute, reflexed (4-)5-9 mm. Stamens 30-45 mm, white with sulphurous anthers, tube 9-15 mm. Ovary solitary, densely tomentose or woolly, c. 3-5 mm; stipe 1-5 mm. Pod densely ferrugineously puberulous or tomentose (when young), glabrescent, oblong, flat, 9.5-20 by 2.5-4 cm, margins thickened, valves with prominulous transverse veins along both sutures, tardily dehiscent along both sutures. Seeds brown, suborbicular, flat, c. 13 mm in diameter, to 2 mm thick; areole c. 10 mm in diameter, pleurogram parallel to the margins, open towards the hilum, funicle thin, c. 15 mm.
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