- knotty rhatany,
- know a thing or two,
- know all the answers
Origin of knotweed
Examples from the Web for knotweed
Japanese knotweed, for all its invasive attributes, was an ornamental plant for the Victorians.
Those of us who are gardeners will certainly agree that “unfortraedde” is the right name for knotweed.The Old English Herbals|Eleanour Sinclair Rohde
It is Polygonum Virginicum, and so far without a common name, unless Virginia knotweed be satisfactory.Seed Dispersal|William J. Beal