Vines, herbaceous, climbing, to 3 m; stems quadrangular becoming subterete, tuberculate-hispid, scabrous. Leaves in whorls of 4, often ± unequal; petiole 0.5-1.8 cm or smallest leaves sometimes subsessile; blade drying thickly leathery, ovate-oblong to elliptic, (0.7-)2-4.5 cm, tuberculate-hispid, base rounded to cordulate, margin slightly revolute, apex obtuse; principal veins 5, palmate. Inflorescences thyrsoid, paniculate, 3-7 cm, with axillary and terminal cymes; axes rather stout; bracteoles ovate or lanceolate, 2.5-3.5 mm. Flowers unknown. Immature mericarp berry black when dry, ca. 4 mm in diam. Fr. autumn.
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