Stems climbing dextrorsely, unarmed, glabrous; leaves alternate; petiole about 6 cm. long, glabrous; leaf blades broadly ovate, up to 11.2 cm. long and 9.8 cm. wide, acuminate, lightly cordate at base, membranous, entire, glabrous, 9-to 11-nerved; staminate inflorescences 2 or 3 in an axil, up to 17 cm. long, unbranched; flowers solitary or paired or rarely in threes, pedicellate, the pedicels 1-1.5 mm. long; perianth segments purple, ovate-oblong, 1.75 mm. long, spreading, glabrous; stamens 3; staminodia none; filaments very short, distinct, inserted on a fleshy, central disk, the anthers small, upwardly dehiscent; rudimentary style none; pistillate flowers and capsules unknown.
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