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DescriptionThis introduced perennial plant is a non-climbing vine up to 3' long that freely branches at the base. The light green stems are hairless and somewhat angular or ridged. The opposite leaves are about 11½" across and amply separated from other pairs of leaves on the stems. They are orbicular, orbicular-cordate, or orbicular-oval in shape, smooth along the margins, and hairless. The upper surface of the leaves is often shiny and has widely scattered glandular black dots. The leaves have short hairless petioles about ¼" in length. From the axil of each leaf, there occasionally appears a single yellow flower on a short pedicel. Each flower is about 1" across, consisting of 5 yellow petals (actually petal-like lobes of the corolla), 5 yellow stamens, a single green pistil, and a green calyx with 5 triangular or broadly lanceolate teeth. This calyx is hairless and its teeth are shorter than the petals. The petals have scattered glandular dots that are dark red. On rare occasions, some plants will produce flowers with 6 petals and 6 stamens. The blooming period occurs intermittently from late spring to late summer, and can last 2-3 months for a colony of plants, although usually few flowers are produced, which bloom during daylight hours. Rarely are seed capsules produced by these flowers. When it occurs, a seed capsule is ovoid in shape and has 5 cells, each cell containing several closely packed seeds. Moneywort often forms new roots at the axils of the opposite leaves, generating new stems that have a tendency to spread across the ground in all directions. These roots are rather slender and fibrous. Moneywort often forms vegetative colonies.