Climber. Branches tomentose with longer hispid hairs, often becoming glabrous. Leaves: petiole 0.5-2 cm long; blade ovate to elliptic, 1.3-3.3 times as long as wide, 3.7-12.6 by 1.7-8.7 cm, apex acuminate, rarely to obtuse, base obtuse to weakly cordate; tomentose above and beneath, tomentose beneath and glabrous above or, rarely, glabrous on both surfaces; 7-15 pairs of secondary veins. Inflorescence of terminal and axillary panicles, 3.4-14.7 cm long; peduncle tomentose; pedicels tomentose, 0.8-4.5 mm long. Sepals ovate, 1.1-2.2 times as long as wide, 0.9-1.8 by 0.5-1.2 mm, apex obtuse or rounded, sparsely to densely tomentose or puberulent. Corolla pink; in bud the tube is cylindrical and the head about the same width; tube 1.4-4 by 2.1-2.4 mm, 2.5-3.3 times as long as calyx, 0.7-1.4 times as long as lobes, outside densely pubescent, rarely sparsely so, pubescent to glabrous in throat and inside tube; lobes 2-3.8 by 0.8-1.3 mm, 1.6-5.4 times as long as wide, outside pubescent on parts exposed in bud. Stamens inserted at 0.7-1.7 mm from base, 0.3-0.4 of tube length; filaments with projections at the sides; anthers 3-4.3 times as long as wide, 1.2-1.7 by 0.3-0.5 mm; narrow triangular, apex acuminate, base sagittate; included in corolla tube. Disk of 5 elliptic or oblong lobes; 0.6-1.1 times as long as ovary, 0.3-1 mm long. Ovaries 0.5-1.2 mm long, pubescent; style 0.7-1.1 mm long; style head 0.5-1.2 mm long with a cup-shaped base. Fruit fusiform; weakly tomentose, 3.2-4.7 by 1.3-1.8 cm. Seeds 8-9 by 3.7-4.4 mm; coma brownish, 1-2 cm long.
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