Tree to 15 m tall. Leaves: petiole 4-6 mm long; blade elliptic, 6-10.5 by 2-3.5 cm, 2.7-3.8 times as long as wide, apex obtuse, sometimes acute, base cuneate, glabrous, 5-7 pairs of secondary veins, tertiary venation obscure; domatia present, without tufts of hairs. Inflorescence lax, 6.7-7.5 cm long, 1-6-flowered, glabrous; peduncles 4-5 mm long; pedicels 20-25 mm long. Sepals ovate, 2-4.5 by 2-3.5 mm, 1-1.5 times as long as wide, apex acute to obtuse, glabrous or puberulent at tips. Corolla tube 23-26 mm long, lower part 17-20 mm long, upper part 5-6 mm long, glabrous outside, glabrous or sparesly pubesent inside; lobes 15-20 by 10-14 mm, 0.5-0.8 times as long as wide, glabrous outside, pubescent inside near the base. Stamens slightly exserted, inserted at 19-22 mm from corolla base; anthers 5-6.5 by 1.5-2 mm. Ovaries 4-5 mm high, glabrous or sparsely pubescent; style 14-19 mm long; style head 2 mm long. Disk cup-shaped, 4-5 mm high. Fruit 10-15.5 by 1-1.5 cm. Seeds: grain 20-27 by 2 mm; beak 35-45 mm long; coma hairs 10-50 mm long.
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