Tree to 45(-65) m tall; trunk straight, to 100 cm dbh, with short buttresses; outer bark grey, grey-brown or black, inner bark white, light orange or greenish, softwood white or pale yellow. Branches transversely fissured; lenticellate; glabrous or locally pubescent. Leaves: petiole 5-14(-30) mm long; blade coriaceous or papery, elliptic, less often obovate, 10.5-26(-35) by 4.6-13 cm, 1.7-2.5 times as long as wide, apex acute, acuminate or obtuse, base rounded to cuneate, sparsely puberulent beneath, 11-18 pairs of secondary veins, tertiary venation clearly visible, domatia absent. Inflorescence 8-10 cm long, 1-or 2-flowered; peduncles 2-5 mm long; pedicels 30-50 mm long. Sepals 4-7 by 2-3 mm, apex obtuse to acuminate, glabrous outside, colleters inside. Corolla white or creamy; tube 17-45 mm long, lower part 9-15 mm long, upper part 12-25(-40) mm, glabrous; lobes elliptic or narrowly obovate, 22-40 by 10-18 mm, 2.2-3.2 times as long as wide, glabrous or pubescent inside and outside. Stamens not exserted from corolla tube, inserted at 7-19 mm from the corolla base; anthers 6-7 by 1-2 mm. Disk cup-shaped, 2-3 mm high, obscurely 5-lobed. Ovaries 2.5-4 mm high, glabrous; style 1-1.9 cm long; style head 1-3 mm long. Fruit pendulous, 25-85 by 1-2.5 cm. Seeds: grains 28-35 by 2-3.5 mm, beak glabrous for c. 5 cm with a coma for 3-8 cm; coma hairs 2-10 cm long.
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