Tree to 10(-15) m tall, trunk to 35 cm dbh; bark smooth, pale grey-brown. Branches lenticellate, glabrous even when young. Leaves: petiole 8-30 mm long, glabrous; blade thin, elliptic to obovate, 4-25 by 1-9 cm, 1.9-4.4 times as long as wide, apex short acuminate, base cuneate, glabrous above and beneath, 6-15 pairs of secondary veins, arcuate ascending, tertiary subscalariform but hardly visible. Inflorescence few-flowered, 6-17 cm long, glabrous; peduncle 2-5 cm long; pedicels 8-30 mm long. Flowers with a pleasant smell. Calyx of a tube and erect lobes, 8-50 by 2.5-6 mm, 3.5-7.7 times as long as wide; calyx tube barely wider than corolla tube, 7-45 mm long, 5.5-12 times as long as lobes, glabrous outside; lobes ovate to orbicular, 1.4-6 by 2-6 mm, 0.6-3 times as long as wide, apex rounded. Corolla white; tube 24-50 mm long, 1.2-3 times as long as calyx, 0.7-1.7 times as long as lobes, glabrous inside and outside; lobes elliptic to obovate, 16-55 by 8-40 mm, 1.1-2.7 times as long as wide, apex acute to obtuse. Stamens inserted at 17-40 mm from corolla base; anthers 4-8 by 1.5-3 mm. Disk annular, c. 1 mm high. Ovaries 2-3 mm high, glabrous; style and style head 15-36 mm long. Fruit globose, rarely fusiform, 2.7-7 by 1.3-3.5 cm, brownish to reddish. Seeds with an orange aril, furrowed, almost round and flattened and concave on one side or crescent-shaped where the concave side has folded completely over, 7.5-12 by 4.5-10 by 3.5-4 mm.
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