Native to:
Alabama,
Arizona,
Arkansas,
Assam,
Bahamas,
Bangladesh,
Bermuda,
British Columbia,
California,
China North-Central,
China South-Central,
China Southeast,
Colorado,
Connecticut,
Cuba,
Delaware,
District of Columbia,
East Himalaya,
El Salvador,
Florida,
Georgia,
Guatemala,
Idaho,
Illinois,
India,
Indiana,
Iowa,
Japan,
Jawa,
Kansas,
Kentucky,
Korea,
Laos,
Louisiana,
Maine,
Malaya,
Manchuria,
Manitoba,
Maryland,
Massachusetts,
Mexico Central,
Mexico Gulf,
Mexico Northeast,
Mexico Northwest,
Mexico Southeast,
Mexico Southwest,
Michigan,
Minnesota,
Mississippi,
Missouri,
Montana,
Myanmar,
Nansei-shoto,
Nebraska,
Nepal,
Nevada,
New Brunswick,
New Hampshire,
New Jersey,
New Mexico,
New York,
North Carolina,
North Dakota,
Nova Scotia,
Ohio,
Oklahoma,
Ontario,
Oregon,
Pakistan,
Pennsylvania,
Primorye,
Québec,
Rhode I.,
Saskatchewan,
South Carolina,
South Dakota,
Taiwan,
Tennessee,
Texas,
Thailand,
Tibet,
Utah,
Vermont,
Vietnam,
Virginia,
Washington,
West Himalaya,
West Virginia,
Wisconsin,
Wyoming
Introduced into:
Albania,
Algeria,
Austria,
Belgium,
Bulgaria,
Burundi,
Canary Is.,
Central European Russia,
Czechoslovakia,
Denmark,
East Aegean Is.,
East European Russia,
France,
Germany,
Great Britain,
Greece,
Hungary,
Inner Mongolia,
Ireland,
Italy,
Kazakhstan,
Netherlands,
New Zealand North,
New Zealand South,
Poland,
Prince Edward I.,
Romania,
Rwanda,
Sicilia,
South European Russia,
Spain,
Switzerland,
Tadzhikistan,
Tunisia,
Ukraine,
Uzbekistan,
Yugoslavia