- any of several knotty-stemmed plants belonging to the genus Polygonum, of the buckwheat family.
Origin of knotweed
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for knotweed
Japanese knotweed, for all its invasive attributes, was an ornamental plant for the Victorians.The Best of Brit Lit
December 17, 2010
- any of several polygonaceous plants of the genus Polygonum, having small flowers and jointed stems