Tree to 20 m high, to 40 cm dbh. Bark smooth or shallowly fissured, dark brown, lenticellate. Leaves in a pair equal or unequal; petiole 5-45 mm long, glabrous; blade coriaceous, elliptic, 8-32 by 2.5-13.5 cm, 2-4 times as long as wide, apex rounded to shortly acuminate or apiculate, base cuneate, glabrous above and beneath, 5-16 pairs of secondary veins, rather straight, tertiary venation obscure. Inflorescence 5-20 cm long, lax, glabrous; peduncle 1-15 cm long; pedicels 3-15 cm long. Sepals ovate to suborbicular, 2-4 by 2-4 mm, 0.8-1.5 times as long as wide, apex rounded, glabrous, ciliate. Corolla white, sometimes with a greenish tube, with a globose to ovoid bud head which is 0.15-0.35 of bud length, apex rounded; tube 15-19 by 2-4 mm, 4-6.1 times as long as calyx, 0.9-1.2 times as long as lobes, glabrous outside; lobes falcate elliptic, 15-21 by 5-8 mm, 2-4.2 times as long as wide, apex rounded; ciliate on lobes, puberulent or glabrous inside. Stamens inserted in the lower half of the corolla tube; anthers 2.5-3.5 by 0.6-1.2 mm. Ovaries 2-3 mm high; style and style head 3-8 mm long. Fruit obliquely ellipsoid to subglobose, 40-55 by 35-45 cm, apex mostly rounded, rarely to acuminate. Seeds 10-12 by 5-6 by 4-5 mm.
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