Tubers vertical, cylindric, mucilaginous. Stem twining to left, white or light brown woolly, glabrescent. Leaves alternate, simple; petiole 3--6 cm; leaf blade broadly cordate to ovate, 4--8.5 × 5--10.5 cm, adaxially sparsely woolly, abaxially white woolly, ± glabrescent, basal veins 7 or 9(or 11), base shallowly cordate, apex acuminate or caudate-acuminate. Male inflorescence not known with certainty, but apparently indistinguishable from that of Dioscorea yunnanensis. Female spikes sometimes produced with new leaves, to 3 cm; rachis often shorter than mature capsule. Female flower: bracts reddish brown dotted, lanceolate; perianth lobes ovate-triangular, ca. 1.2 mm; style 3-ribbed, base enlarged, stigma 3-fid, reflexed. Capsule erect, ovoid-oblong or oblong, 1.1--2 cm, densely pubescent; wings 0.8--1.3 cm wide, entire, rarely undulate. Seeds inserted near base of capsule; wing pointing toward capsule apex. Fl. Jul--Aug, fr. Sep--Oct.
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A yam. It is deeply rooted hairy climber. The stem turns anti-clockwise. There are 1-4 root tubers. They are 20-40 cm long and 1-4 cm wide. The outside is yellowish-red and white and sticky inside. The leaves are oval or heart shaped with hairs underneath. The flowers are purple red.
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