Tubers vertical, cylindric; transverse section white; roots fibrous. Stem twining to left, woolly, glabrescent. Leaves alternate, simple; petiole 3--5(--8) cm; leaf blade orbicular-or ovate-cordate, 4.5--11 × 4--13.5 cm, adaxially glabrous, abaxially sparsely woolly, sparsely pubescent, or glabrous, basal veins 7 or 9, base cordate with narrow sinus, apex acuminate or caudate. Male thyrses usually 2 or 3 together, 3--12 cm, sparsely pubescent or glabrous. Male flowers: in pedunculate cymules of 2--6; bract solitary, brown-red dotted, triangular-ovate or ovate, 1.5--2 mm, base clasping, apex acute; perianth lobes lanceolate, ca. 2.2 mm; stamens 6, filaments equaling or slightly longer than anthers, anthers dorsifixed, introrse. Female spikes 3--14 cm. Female flowers: bracts triangular-lanceolate, brown-red dotted, perianth lobes narrowly ovate or oblong, ca. 2 mm, apex slightly obtuse; style slightly enlarged basally, stigma 3-fid. Capsule reflexed or spreading, 1.5--3 cm, glabrous, smooth; wings 0.5--0.8 cm wide, sometimes slightly undulate. Seeds inserted near base of capsule; wing pointing toward capsule apex. Fl. Jul--Aug. fr. Sep--Oct.
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A yam. The tubers are vertical and cylinder shaped. The stems twine to the left. The leaves are alternate and simple. The leaf stalk is 3-5 cm long. The leaves are round or heart shaped. They are 5-11 cm long by 4-13 cm wide. The male spikes are 3-12 cm long with 2-6 flowers. The female spikes and 3-14 cm long. The female flowers have triangle to sword shaped bracts and have red dots.
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