Tree 12-25 m high. Bark dark brown; inner bark light brown, without white latex from the trunk. Branchlets glabrescent. Leaves in whorls of 3 or 4; petiole puberulous or glabrescent, 5-11 mm long, colleters minute and densely packed together in the axils; blade coriaceous when dried, elliptic to narrowly elliptic or narrowly obovate, 10-18 by 3-6.7 cm, 2.4-3.5 times as long as wide, apex narrowly acuminate (sometimes abruptly acuminate), acumen up to 2 cm long with a blunt point, base acute or decurrent onto the petiole, glabrous or glabrescent above, densely pubescent (velutinate) beneath; 23-26 pairs of secondary veins (short interstitial veins sometimes present), parallel and slightly arched, forming an angle of 70-80(-90)° with the midrib (the widest angles usually at the base of the leaves), 3-8 mm from each other, submarginal vein very distinct; tertiary venation reticulate, mostly conspicuous on both sides. Inflorescence 3.5-5 cm long, many-flowered; pedicels stout 1-2(-3) mm long, softly pubescent. Bracts and bracteoles sepal-or scale-like, ovate or triangular, 1-1.5 mm long, acute or acuminate, ciliate, densely pubescent outside, glabrous inside, the linear bracts (17-25 by 1-1.5 mm) and leafy bracts (c. 4.5 by 1 cm) sometimes present at the base of the inflorescence. Flowers fragrant. Sepals connate at the base for 0.8-1 mm, ovate, 2.4-2.8 by 1.6-2 mm, obtuse, ciliate, densely pubescent outside, glabrous inside, erect. Corolla lobes dextrorse; white, 8-8.5 mm long in the mature bud and forming an ovoid (acuminate) head, c. 4 by 1.5 mm, glabrous or minutely hairy around the stamens outside; tube 5.5-5.8 mm long, c. 2(-2.5) mm wide around the stamens; lobes lingulate, slightly oblique, 4.6-5.2 by 2-2.5 mm, c. 2.1 times as long as wide, pilose on the lower half inside, not ciliate, apex rounded, auriculate at the base on the right side. Stamens inserted at 3.6-3.7 mm from the base; anthers ovate 1.2-1.4 by 0.4-0.6 mm, obtuse or mucronulate. Pistil glabrous, 4-4.1 mm long; ovary ovoid, c. 1 by 1 mm, of 2 carpels, with a disk-like thickening at the base, c. 0.5 mm high; style c. 2.5 mm long; style head ovoid, c. 0.7 mm long, with a cleft stigmoid apical part 0.2 mm high. Fruit a pair of follicles, c. 43 cm by 4.7-5 mm, glabrous. Seeds dull-brown, elliptic or ovate, 6-8.5 by 2.6-3 mm, pubescent on both sides, one end acuminate with an acumen 1.5-3 mm long, the other end rounded; longest cilia 3-5 mm long, becoming gradually shorter towards the margins.
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