Virginia knotweed
- kingdom: Plantae
- phylum: Tracheophyta
- class: Magnoliopsida
- order: Caryophyllales
- family: Polygonaceae
- genus: Persicaria
- species: Persicaria virginiana
Niagara Falls
Ontario
CanadaGöteborg
Västra Götaland
SwedenMobile
AlabamaDenver
ColoradoBerwyn
Bourbonnais
Bradley
Brookfield
Calumet City
Chicago
Evanston
Franklin Park
Glenview
Kenilworth
La Grange Park
Lake Barrington
Lisle
Lockport
Lyons
Manhattan
Morton Grove
Norridge
North Barrington
North Peoria
North Riverside
Oquawka
Peoria
River Grove
Riverside
Southern View
Tower Lake
Wilmette
IllinoisCrawfordsville
Michigan City
IndianaWellman
IowaPineville
KentuckyGardere
LouisianaCambridge
MassachusettsDe Kalb
MississippiBent Creek
Tryon
North CarolinaMansfield
OhioBala Cynwyd
Easton
Marysville
Pittsburgh
Reiffton
Thorndale
West Easton
Wilson
PennsylvaniaNashville
Tennessee
United States