The Redshank (Persicaria maculosa, formerly Polygonum persicaria) is a perennial plant from the Knotweed family Polygonaceae. It is also called Persicaria, Redleg, Lady's-thumb, Spotted Ladysthumb, and Adam's Plaster in Newfoundland. Native to Europe, it is an invasive species in the Great Lakes region where it was first spotted in 1843.
