Tree 25-40 m high, 35-60 cm dbh. Bark deeply longitudinally and horizontally fissured and peeling off in rectangular flakes, greyish; inner bark soft, granular, pale yellow, with copious white latex. Branchlets terete, glabrous. Leaves in whorls of (4-)5-6(-8); petiole (0-)3-6(-10) mm long; colleters deltoid (rarely persistent) in the leaf axils; blade thinly coriaceous, narrowly elliptic, 3.5-11 by 0.7-2.2 cm, 3.3-7.5 times as long as wide, apex acute or obtuse, mostly pointed, base acute or decurrent onto the petiole, glabrous on both sides; 23-40 pairs of secondary veins, very fine, rather straight, forming an angle of 80-90° with the midrib, 1-3 mm from each other, short interstitial veins present, tertiary venation reticulate. Inflorescences 3-10(-18) cm long, 1-4 together, many-flowered; pedicels (1-)2-4(-5) mm long, slender, glabrous, usually with 1 or 2 bracteoles. Bracts and bracteoles sepal-like, ovate or triangular, 0.5-0.7(-1) mm long, ciliate or not, glabrous on both sides, acute or obtuse. Flowers fragrant. Sepals light green or pale yellow, connate at the base for 0.2-0.3 mm, ovate, (0.8-)1-1.5 by 0.7-1 mm, erect, obtuse, glabrous on both sides, ciliate. Corolla lobes sinistrorse; white or pale yellow, 8-12.4 mm long in the mature bud and forming an ovoid head, 2.5-4 by 1-1.5 mm, glabrous or minutely ciliate on corolla lobes outside; tube 7-8 mm long, 1.4-1.9 mm wide around the stamens; lobes ovate, 4-5.1 by 1.8-2.5 mm, 2-2.8 times as long as wide, sometimes oblique or slightly falcate, with white or yellow hairs at extreme base inside, apex obtuse or rounded, mostly not ciliate in open flowers. Stamens inserted at 5.2-6.4 mm from the base; anthers ovate, 1-1.2 by 0.4-0.5 mm, obtuse. Pistil 5.6-7.1 mm long; ovary ovoid, 1-1.4 by 0.8-1 mm, of 2 carpels, glabrous; style 4-6.5 mm long; style head pagoda-shaped, 0.6-0.8 mm high, with a robust cleft stigmoid apical part 0.2-0.3 mm high. Fruit a pair of follicles, 8-20 cm by 2-2.5 mm, glabrous. Seeds oblong, 4-5 by 1.1-1.3 mm, glabrous on both surfaces, ends rounded, longest cilia 8-10 mm long, reduced and becoming short or glabrous towards the margins.
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Tree to 35 m high. Leaves 4–6-whorled; petiole 5–7 mm long; lamina lanceolate, 2–11.5 cm long, 0.5–2.2 cm wide, cuneate, acute to obtuse, discolorous; secondary veins 23–45 each side of midrib, 1–2 mm apart; tertiary venation reticulate and faintly visible. Inflorescence 5–11 cm long. Flowers 8–11 mm long, 6–8 mm diam.; pedicels 1.5–7 mm long. Sepals ovate, 1–1.5 mm long. Corolla pale yellow; tube 7–9 mm long, externally glabrous; lobes lanceolate, 4.8–5.2 mm long, glabrous apart from some sparse internal indumentum near base. Fruit 13–20 cm long. Seeds oblong, 5–6 mm long; hairs 4–6 mm long.
A tree. It grows 3-25 m tall. The leaves are in rings of 3-7. The flowers are cream to white. The fruit is 13-20 cm long. The seeds are 5-6 mm long by 1-2 mm wide.
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