Stems very slender, climbing dextrorsely, glabrous, not spiny; leaves alternate; petioles 1.5-4 cm. long, glabrous; leaf blades ovate, up to 14 cm. long and 13 cm. wide (the upper much smaller), acuminate, entire, deeply cordate at base, usually 11-nerved, glabrous; staminate racemes 1-3 in an axil, unbranched, usually about 10 cm. long, the rhachis slender, glabrous; flowers solitary, pedicellate, the pedicels 2-3 mm. long, glabrous; perianth segments oblong, about 1.8 mm. long, reflexed, free, glabrous; stamens 3, inserted on base of perianth segments, the filaments about 1 mm. long, much enlarged at base and connate with each other, the anthers minute, upwardly dehiscent; staminodia none; rudimentary ovary none; pistillate spikes simple, usually 10 cm. long or less; capsules oblong, rounded at apex, about 18 mm. long and 8 mm. wide, glabrous; seeds about 6.5 mm. long (including wing) and 2.2 mm. wide, winged at basal end.
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A yam. It is a climbing vine. The leaves are rounded heart shaped. It produces a fattened tuber.
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