Perennial twining or climbing herb, up to 2 m. Stems twisting, shortly branched. Leaves ovate, shiny, somewhat succulent. Flowers white, tubular at the base with tepal lobes reflexed and stamens excerted. Fruit a small spherical berry, black.
Vines, erect to deflexed, branching, climbing to 1.5 m; roots tuberous. Stems slender, to 3 m, wiry, smooth to slightly ridged; cladophylls solitary at each node, broadly lanceolate to ovate, 15–35 × 5–15(–20) mm, leathery, with 20–24 parallel veins. Leaves membranous, 1–2 mm; blade broadly lanceolate. Inflorescences in axillary umbels, 1–3(–4)-flowered. Flowers bisexual; perianth campanulate; tepals white, with green median stripe abaxially, 5–7 × 1–1.5 mm; pedicel 5–8 mm, with hard, raised joint 1–3 mm above base. Berries red, 6–8 mm. Seeds 1–4(–6). 2n = 20.