Tree 17-32 m high, 35 cm dbh. Bark smooth, grey or pale brown. Branchlets glabrous. Leaves in whorls of 3 or 4; petiole 12-24 mm long; colleters minute and densely packed together in the axils; blade chartaceous, obovate to narrowly obovate, 9.5-23 by 3.2-9.5 cm, 2.7-3.5 times as long as wide, apex shortly acuminate, acumen up to 10 mm long with a blunt point, base acute to decurrent onto the petiole, glabrous on both sides; 15-22 pairs of secondary veins, forming an angle of 60-80° with the midrib, 5-14(-18) mm from each other, joining at the ends and forming a thin submarginal vein; tertiary venation reticulate, mostly conspicuous on both sides. Inflorescences 5.5-12 cm long, many-flowered; pedicels 1.5-4 mm long, pubescent. Bracts and bracteoles sepal-or scale-like, ovate to broadly ovate, up to 1 mm long (the bracteoles are usually much smaller), obtuse to acuminate, ciliate, pubescent outside, glabrous inside. Flowers with a slightly sour odour. Sepals connate at the base for 0.8-1 mm, ovate, 1.7-2.5 by 0.8-1.5 mm, acute or obtuse, pubescent outside and on the free parts inside. Corolla lobes dextrorse; white, 6.5-7.2 mm long in the mature bud and forming an ovoid head, 2.3-3.5 by 1.2-1.5 mm, shortly pubescent outside (except the basal part within the calyx which is glabrous); tube 5.4-5.6 mm long, 1.2-1.5 mm wide around the stamens; lobes ovate, 3-4.5 by 1.8-2.3 mm, 1.7-2 times as long as wide, pilose inside, ciliate. Stamens inserted at 3.5 mm from the base; anthers ovate, c. 1 by 0.35 mm, obtuse or mucronulate. Pistil 3.1-3.7 mm long, glabrous; ovary ovoid, 0.7-1 by 0.6-0.8 mm, of 2 carpels, with a slightly wavy disk-like thickening at the base, 0.2-0.3 mm high; style 2-2.2 mm long; style head ovoid or funnel-form, 0.5-0.7 by 0.3 mm, with a minute cleft stigmoid apical part up to 0.15 mm high. Fruit (known only from the type specimen) a pair of follicles, 60 cm by 3.5 mm, glabrous. Seeds dark brown, narrowly ovate or elliptic, 8.5 by 1.8-2 mm, pubescent, one end acute or acuminate, acumen 1-1.5 mm long, the other end obtuse or rounded; longest cilia 10-12 mm long, gradually becoming shorter towards the margins.
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