Woody vines. Stems erect, usually grayish brown, rugosely lenticellate; branchlets terete, densely covered with prominent, granulate, bulliform tubercles. Petiole flat, narrowly winged; leaf blade broadly ovate, 3-4.5 × 1.6-4 cm, abaxially pale green, adaxially glossy, both surfaces brown when dry, densely bullate, basal veins 5-7, reticulate veins inconspicuous, base broadly cuneate or subrotund, usually oblique, abruptly contracted into petiole, margin revolute, apex obtuse or subrotund. Male inflorescences fasciculate or umbellate. Female inflorescences of solitary or paired flowers; peduncle ca. 4 mm, ridged; bracts ovate or broadly ovate, ca. 1 mm. Flowers unisexual, ovoid, ± ciliate, sessile; bracteoles 4 or 5, forming involucre, ovate, smaller than bracts; perianth apex incurved. Styles short or absent; stigma inconspicuously lobed. Drupe reddish brown when mature, ovoid, 4-6 mm; persistent perianth very small. Fl. and fr. May-Aug.
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