Native to:
Albania,
Alberta,
Altay,
Amur,
Assam,
Austria,
Baltic States,
Belarus,
Belgium,
British Columbia,
Bulgaria,
Central European Rus,
China North-Central,
China South-Central,
China Southeast,
Connecticut,
Corse,
Czechoslovakia,
Delaware,
Denmark,
District of Columbia,
East European Russia,
Finland,
France,
Georgia,
Germany,
Great Britain,
Greece,
Hungary,
Iceland,
Idaho,
Illinois,
Indiana,
Inner Mongolia,
Iran,
Ireland,
Italy,
Japan,
Kazakhstan,
Kentucky,
Khabarovsk,
Korea,
Krasnoyarsk,
Kriti,
Krym,
Maine,
Manchuria,
Manitoba,
Maryland,
Massachusetts,
Michigan,
Minnesota,
Montana,
Netherlands,
New Brunswick,
New Hampshire,
New Jersey,
New York,
Newfoundland,
North Carolina,
North Caucasus,
North European Russi,
Northwest European R,
Norway,
Nova Scotia,
Ohio,
Ontario,
Pennsylvania,
Poland,
Portugal,
Primorye,
Prince Edward I.,
Québec,
Rhode I.,
Romania,
Saskatchewan,
South Carolina,
South European Russi,
Spain,
Sweden,
Switzerland,
Taiwan,
Tennessee,
Transcaucasus,
Turkey,
Turkey-in-Europe,
Ukraine,
Vermont,
Virginia,
Washington,
West Siberia,
West Virginia,
Wisconsin,
Yugoslavia
Introduced into:
Irkutsk