Herbaceous vines. Branches stout, glabrous. Petiole 10-20 cm or slightly longer; leaf blade triangular-rotund, sometimes undulately lobed, length and width 10-19 cm or slightly larger, thinly papery, glabrous on both surfaces, base subtruncate, margin entire or undulate, apex obtuse to acutely acuminate, palmately 9-12-veined, reticulation slightly conspicuous. Inflorescences compound umbelliform cymes, axillary or on short axillary branches, slightly fleshy. Male peduncle 2-5 cm or longer; umbellet pedicels 5-7, 0.5-1.5 cm; cymelet pedicels pubescent. Male flowers: sepals 6, obovate-rhombic, 1.5-1.7 × 0.8-1.1 mm, base abruptly clawed below middle, apical margin involute, abaxially pubescent; petals 3, fleshy, broadly cuneate, ca. 0.7 mm, margin with sides thickened, imbricate, apex repand or inconspicuously 2-lobed; synandrium slightly shorter than or subequal to petals. Female inflorescences with peduncle 2-6(-12) cm; umbellet pedicel short. Female flowers: sepal 1, elliptic-ovate, ca. 1 mm or slightly longer; petals 2, rotund, ca. 0.7 mm. Drupes obovoid; endocarp 5-6 × 4-5 mm. Fl. summer, fr. autumn.
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