Tree 5-35(-46) m high, 8-70 cm dbh, fluted at base, or with small or steep buttresses. Bark smooth, shallowly fissured, or scaly in horizontal and longitudinal fissures, sometimes with large scattered protruding lenticels, grey or brownish; inner bark yellowish, without latex from the trunk. Branchlets glabrous or puberulent. Leaves in whorls of 3 (rarely 4); petiole 8-30 mm long; colleters minute or shortly lingulate, 20-35 in the axils; blade chartaceous or thinly coriaceous, obovate to narrowly obovate (rarely elliptic), 4-18 by 1.5-7 cm, 1.9-4.7 times as long as wide, apex acuminate, with a blunt point, base acute to decurrent onto the petiole, glabrous above, glabrous or puberulous beneath; 10-20 pairs of secondary veins, forming an angle of 60-80° with the midrib, 4-10(-12) mm from each other, forming a thin submarginal vein; tertiary venation reticulate, sometimes conspicuous on both sides. Inflorescence 3-9 cm long, many-flowered; pedicels 0.5-2(-3) mm long, pubescent. Bracts and bracteoles sepal-or scale-like, up to 0.7 mm long, acute or acuminate, ciliate. Flowers fragrant. Sepals pale green, connate at the base for 0.8-1.5 mm, obovate, 1.3-2 by 0.7-1.2 mm, acute, obtuse or rounded, reflexed or not, rusty pubescent outside and at the lobed parts inside. Corolla lobes dextrorse; white, cream, pale yellow or pink, 3-5(-6) mm long in the mature bud and forming a subglobose or ovoid head, 0.8-1.6 by 0.8-1.3 mm, rusty pubescent outside (except the basal part within the calyx or sometimes at the apex of which glabrescent or puberulous); tube 3-4.5 mm long, almost cylindrical, 0.8-1.6 mm wide around the stamens; lobes suborbicular or ovate, 1-2.3 by 1-1.8 mm, 1-1.5 times as long as wide, pilose inside, ciliate. Stamens inserted at 2-2.8 mm from the base; anthers ovate, 0.7-1 by 0.3-0.4 mm, obtuse or sometimes acute. Pistil 2-3 mm long; ovary ovoid or broadly ovoid, 0.5-1 by 0.6-0.8(-1) mm, of 2 carpels, glabrous, with a narrow disk-like thickening at the base, 0.1-0.3 mm high; style 1-1.8 mm long; style head ovoid or funnel-form, 0.3-0.5 by 0.2-0.3 mm, with a cleft stigmoid apical part up to 0.1 mm high. Fruit a pair of follicles, 20-53 cm by 1.7-2.6(-3) mm, glabrous. Seeds densely pubescent, elliptic to oblong, (4-)6-8.6 by 1.2-1.8(-2) mm, one end acuminate up to 4 mm long, the other end rounded; longest cilia 5-13 mm long, reduced and becoming shorter gradually towards the side margins.
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