Tree to 25 m high, to 30 cm dbh. Branches lenticellate; branchlets glabrous. Leaves: petiole 8-30 mm long, glabrous; blade obovate to elliptic, 7.2-40 by 4.5-17 cm, 1.7-3.5 times as long as wide, apex acuminate, base cuneate, glabrous above and beneath, 9-15 pairs of secondary veins, arcuate ascending near margins, tertiary venation laxly scalariform to reticulate. Inflorescence lax, many-flowered, 18-27(-40) cm long, glabrous; peduncle 11-14.2(-19) cm long; pedicels (6-)12-16(-22) mm long. Calyx with lobes free to base or united for up to 12.5 mm, then usually very irregularly; lobes oblong to narrowly obovate, 22-33 by 3.5-5.5 mm, 4.2-6.3 times as long as wide, apex acuminate, glabrous. Corolla white; tube 22-40 mm long, 1-1.3 times as long as calyx, 1-2 times as long as lobes; lobes elliptic, 16-37 by 18-37 mm, 1-1.5 times as long as wide, apex rounded to emarginate. Stamens inserted in the upper part of the corolla tube; anthers 5-8 by 2-2.5 mm. Disk annular, c. 1 mm high. Ovaries c. 2 mm high. Fruit yellow-white, paired and subglobose, only known at c. 7 cm diameter.
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