noun
: a plant of the genus Clematis especially when small-flowered and climbing: as
a. : the European traveler's-joy
b. : a common clematis ( C. virginiana ) of eastern No. America that sprawls and scrambles over other plants and bears numerous panicles of small creamy white flowers
c. : a rather similar clematis ( C. ligusticifolia ) of the western United States with distinctively fragrant flowers