Native to:
Alabama,
Algeria,
Arizona,
Arkansas,
Assam,
Azores,
British Columbia,
California,
Canary Is.,
China North-Central,
China South-Central,
China Southeast,
Connecticut,
Corse,
Costa Rica,
Delaware,
District of Columbia,
East Himalaya,
El Salvador,
Florida,
Georgia,
Guatemala,
Hainan,
Honduras,
Illinois,
Indiana,
Italy,
Japan,
Jawa,
Kentucky,
Korea,
Kriti,
Laos,
Louisiana,
Madeira,
Maine,
Malaya,
Maryland,
Massachusetts,
Mexico Central,
Mexico Gulf,
Mexico Northeast,
Mexico Northwest,
Mexico Southeast,
Mexico Southwest,
Michigan,
Mississippi,
Missouri,
Myanmar,
Nansei-shoto,
Nepal,
Nevada,
New Brunswick,
New Guinea,
New Hampshire,
New Jersey,
New York,
Nicaragua,
North Carolina,
Nova Scotia,
Ohio,
Oklahoma,
Ontario,
Oregon,
Pakistan,
Pennsylvania,
Philippines,
Portugal,
Prince Edward I.,
Québec,
Rhode I.,
Sicilia,
South Carolina,
Spain,
Sumatera,
Taiwan,
Tennessee,
Texas,
Thailand,
Tibet,
Vermont,
Vietnam,
Virginia,
Washington,
West Himalaya,
West Virginia
Introduced into:
France,
Great Britain,
Ireland