Native to:
Alabama,
Albania,
Altay,
Arkansas,
Assam,
Austria,
Baltic States,
Bangladesh,
Belarus,
Belgium,
British Columbia,
Bulgaria,
California,
Central European Rus,
China North-Central,
China South-Central,
China Southeast,
Connecticut,
Czechoslovakia,
Delaware,
District of Columbia,
East European Russia,
East Himalaya,
Finland,
Florida,
France,
Georgia,
Germany,
Greece,
Hainan,
Hungary,
Idaho,
Illinois,
Indiana,
Iowa,
Italy,
Japan,
Kansas,
Kazakhstan,
Kentucky,
Korea,
Krasnoyarsk,
Kuril Is.,
Louisiana,
Maine,
Manchuria,
Manitoba,
Maryland,
Massachusetts,
Michigan,
Minnesota,
Mississippi,
Missouri,
Montana,
Myanmar,
Nansei-shoto,
Nebraska,
Nepal,
New Brunswick,
New Hampshire,
New Jersey,
New York,
North Carolina,
North Caucasus,
North Dakota,
North European Russi,
Northwest European R,
Ohio,
Oklahoma,
Ontario,
Oregon,
Pennsylvania,
Poland,
Primorye,
Québec,
Romania,
Sakhalin,
South Carolina,
South Dakota,
South European Russi,
Sweden,
Switzerland,
Taiwan,
Tennessee,
Tibet,
Transcaucasus,
Turkey,
Ukraine,
Vermont,
Vietnam,
Virginia,
Washington,
West Siberia,
West Virginia,
Wisconsin,
Yugoslavia
Introduced into:
Denmark,
Great Britain,
Netherlands,
Norway