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Plant Form Vine climbing to 20 m, with tubers to 25 cm diam. Leaves undivided, heart-shaped at base, 3-15 cm long, 2-10 cm wide, with stalk to 1.5 cm long. Flowers in long, drooping racemes, actinomorphic, white, ca. 6 mm diam., fragrant. Fruits Not observed in Australia.