Vines, 2-3 m or longer, glabrous. Roots tuberous, huge, grayish brown outside, densely tuberculate. Stems twining, yellowish green when dry, longitudinally striate, soft, hollow. Petiole usually much longer than lamina, 15-25 cm, swollen at both ends; leaf blade conspicuously peltate, triangular-rounded, 10-18 × 9-18 cm, papery, base truncate, rounded, or slightly cordate, margin entire or repand, rarely horned, apex obtuse, apiculate, palmately 9-or 10-veined. Male inflorescences axillary; peduncle 2-5 cm, without bracts or occasionally with a leafy bract; umbellet pedicels 4-7, 1-3 cm; cymelets with pedicels many, corymbosely arranged. Male flowers: sepals 5 or 6, connate at base, light yellowish green, outer whorl obovate-elliptic, 1.7-2 × 1-1.2 mm, inner whorl broadly ovate, 1.8-2 × ca. 1.5 mm, base clawed, lobes auricled at each side; petals 3, fleshy, often conchiform, ca. 1.4 mm high, with 2 large glands inside; synandrium ca. 0.8 mm. Female flowers unknown. Infructescences with peduncle 2.5-6 cm, with fleshy pedicel. Drupes red, rotund, flattened, ca. 9 mm; endocarp obovate-rotund, ca. 7 × 6 mm. Fl. Aug-Sep.
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