Vines. Branchlets striate, puberulent to subglabrous. Petiole 2-4 cm, glabrous; leaf blade triangular-ovate, 8-13 × 5-7.5 cm, papery, abaxially pale green and puberulent, adaxially dark green and subglabrous, base usually subtruncate or slightly rounded, apex acuminate, palmately 9(-11)-veined, prominent abaxially. Male inflorescences loosely paniculate, axillary, puberulent, branching filamentous, ultimate branching umbelliform; pedicels 1-1.5 mm, bracts ciliate. Male flowers: sepals mitriform, membranous, glabrous, ca. 2 mm; corolla cup-shaped, ca. 1.2 mm; synandrium conspicuously exserted, ca. 2.5 mm. Infructescences ca. 12 cm, sparsely pubescent. Endocarp 5-5.5 × 4-4.5 mm, abaxially bearing 3 rows of tubercles, base subtruncate.
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