European Knotweed (Polygonum arenarium)
Polygonum Arenarium, or more commonly know as European Knotweed, is a forb/herb (a forb/herb is a non-woody plant that is not a grass) of the genus Polygonum. Its duration is annual which means it grows for one season only. Polygonum Arenarium or European Knotweed's floral region is North America US Lower 48, specifically in the states of Massachusetts and Rhode Island.
