Climber to 40 m. Branchlets puberulent or, rarely, tomentose, usually becoming glabrous with age. Leaves: petiole glabrous or puberulent, 0.4-2.5 cm long, blade orbicular, obovate or elliptic, 1.1-3.6 times as long as wide, (1.2-)1.6-11 by 0.6-6.2 cm, apex rounded to short blunt acuminate, base cuneate, rarely obtuse; coriaceous; tomentose, puberulent or glabrous above and beneath; 5-13 pairs of secondary veins. Inflorescence axillary and terminal, 1-13 cm long; peduncle puberulent to densely pale tomentose; pedicels pale tomentose, 1-6 mm long. Sepals oblong, obtuse to rounded, 0.7-1.8 times as long as wide, 0.7-4.3 by 0.9-2.4 mm; tomentose; many colleters. Corolla cream; in bud tube narrow with a large rounded head; tube 2.4-7.5 by 1.3-1.7 mm, 2.3-2.6 times as long as calyx, 0.6-1 times as long as lobes, outside glabrous or pubescent, densely pubescent at tube throat; lobes 2.5-7.5 by 1-1.3 mm, 3.8-4.7 times as long as wide, outside glabrous or puberulent on part exposed in bud, inside pubescent at base and in throat. Stamens inserted 1.7-3 mm from base, 0.4-0.7 of tube length; anthers subsessile, 3.7-8.3 times as long as wide, 2-2.7 by 0.3-0.6 mm, narrow triangular, apex acuminate, base sagittate; included or exserted. Disk entire, 5-lobed, 0.2-0.6 times as long as ovary, 0.3-0.7 mm long. Ovaries 0.7-1.2 mm long, pubescent; style head 0.7-1.3 mm long with a cup-shaped base. Fruit glabrous to tomentose, 8.4-30 cm by 2.8-20 mm. Seeds linear; 2 cm by 1.4 mm; coma fawn, 2.9-3 cm long.
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