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a genus of perennial climbing or trailing herbaceous plants of the family Convolvulaceae. The leaves are cordate or sagittate; the flowers are funnelform or campanulate, white or pink, and solitary in the leaf axils. There are approximately 25 species, distributed mainly in the temperate regions of both hemispheres. The USSR has five species. C. soldanella is widespread along seacoasts, and C. sepium is widely found amid shrubbery. C. pellita (also known as C. dahuricd), which has large pink flowers, is raised as a climbing ornamental, as are several other species.