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(Plants) any of several American clematis plants, esp Clematis virginiana, of E North America, which has clusters of small white flowers
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
any of several climbing varieties of clematis, as Clematisvirginiana, of E North America, with branching clusters of small white flowers.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.