Plants sprawling to low climbing, shrubby, much branched. Branches: bark tardily exfoliating in plates; nodal diaphragms to 1 mm thick; branchlets terete, usually glabrous, sometimes sparsely hirtellous, growing tips enveloped by unfolding leaves; tendrils absent or only at distalmost nodes, soon deciduous if not attached to support, branched, tendrils (or inflorescences) at only 2 consecutive nodes; nodes not red-banded. Leaves: stipules 3–6.5 mm; petiole 1/2 blade; blade reniform, conduplicately folded, 5–10 cm, apex acute to short acuminate, usually 3-shouldered, rarely shallowly 3-lobed, abaxial surface not glaucous, usually glabrous, visible through hairs, veins and vein axils sometimes sparsely hirtellous, adaxial surface usually glabrous. Inflorescences 4–7 cm. Flowers functionally unisexual. Berriesblack, slightly glaucous, globose, 8–12 mm diam., skin separating from pulp; lenticels absent.