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Stems twining, to 2 m long. Leaves ovate to narrowly ovate, acute or shortly acuminate, cuneate, rounded or cordate at base; lamina 40–75 mm long, 3–35 mm wide, 3–11-veined; petiole 3–10 mm long. Flowers 1–3 per cluster; pedicels 8–30 mm long. Perianth segments ovate to narrowly ovate, obtuse, mucronate to acute, 10–14 mm long, deep red. Stamens 6–10 mm long; anthers 2–3 mm long; appendages minute, to 1.5 mm long. Fruit not seen.
A slender climber or vine. It has fleshy tubers. It can be 15 m long. The leaves are large and heart shaped. The leaves are held out from the stems on slender leaf stalks. There are several veins which spread out from where the leaf joins the stalk. The flowers are small and produced singly or in pairs in the axils of leaves. They are dark brown or black with red patches. The fruit are small and oval capsules.
