Common Knotweed (Polygonum plebeium R. Br.)

↑Range - Expand

Legend	Color
Introduced or Not Present

This map is based on our research. We have checked its accuracy to Level 3 ecoregions. Although this plant occurs somewhere in each of these regions, it may only occur in a small part of some or all of them.

Contrasting with USDA and BONAP which report this species as introduced in NJ only, POWO reports this species introduced only in Idaho. We have not yet resolved these inconsistencies, but for now our map is consistent with BONAP and USDA's maps.