Leaves are alternate, heart shaped with a bump or tooth at the base, and can be dark green, or red.
Stem is prostrate, forming a running vine up to 10 feet long, and root at nodes as it trails. Bumps are found along the stem. Stem has milky sap
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Flower is rare but solitary, pale pink to violet trumpet shaped when it occurs.
Roots are tuberous.
Propagation is vegetatively from stem fragments and tuber cuttings.