virgin's bower

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. Any of several climbing plants of the genus Clematis, especially C. virginiana, of eastern North America, having clusters of white flowers and a cluster of seedlike fruits each with a feathery, persistent style. Also called old-man's-beard.

Century Dictionary and Cyclopedia

1. n. A name of several species of Clematis, primarily the European C. Vitalba, the traveler's-joy, also called old-man's-beard, and sometimes hedge-vine, maiden's-honesty, smokewood. The common American virgin's-bower is C. Virginiana, like the last a finely climbing and festooning plant, but with the flowers less white. The native virgin's-bower of Australia is C. microphylla.

GNU Webster's 1913

1. n. (Bot.) a name given to several climbing plants of the genus Clematis, as Clematis Vitalba of Europe, and Clematis Virginiana of North America.

WordNet 3.0

1. n. common climber of eastern North America that sprawls over other plants and bears numerous panicles of small creamy white flowers