a climbing vine, Clematis virginiana, of eastern North America, having branching clusters of small, white flowers and seed pods with silky, grayish plumes.
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British Dictionary definitions for virgin's-bower
any of several American clematis plants, esp Clematis virginiana, of E North America, which has clusters of small white flowers
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012