Native to:
Albania,
Algeria,
Austria,
Baltic States,
Belarus,
Belgium,
Bulgaria,
Central European Rus,
Corse,
Czechoslovakia,
Denmark,
Finland,
France,
Føroyar,
Germany,
Great Britain,
Hungary,
Iran,
Ireland,
Italy,
Morocco,
Netherlands,
Norway,
Poland,
Portugal,
Romania,
Sicilia,
Spain,
Sweden,
Switzerland,
Turkey,
Ukraine,
Yugoslavia
Introduced into:
Alabama,
Argentina Northeast,
Argentina Northwest,
Arkansas,
Azores,
Bahamas,
Bolivia,
British Columbia,
California,
Canary Is.,
Chatham Is.,
Colombia,
Connecticut,
Cook Is.,
Costa Rica,
Cuba,
Dominican Republic,
East Himalaya,
Florida,
Free State,
Georgia,
Guatemala,
Haiti,
Hawaii,
Illinois,
Indiana,
Japan,
Kentucky,
Korea,
Kuril Is.,
KwaZulu-Natal,
Leeward Is.,
Louisiana,
Massachusetts,
Mexico Gulf,
Michigan,
Missouri,
Nansei-shoto,
Nebraska,
New Hampshire,
New South Wales,
New York,
New Zealand North,
New Zealand South,
Newfoundland,
North Carolina,
Northern Territory,
Ohio,
Ontario,
Oregon,
Panamá,
Pennsylvania,
Puerto Rico,
Queensland,
Rhode I.,
Sardegna,
Solomon Is.,
South Australia,
South Carolina,
St.Helena,
Taiwan,
Tasmania,
Texas,
Trinidad-Tobago,
Venezuela,
Vermont,
Victoria,
Virginia,
Washington,
West Himalaya,
West Siberia,
West Virginia,
Windward Is.,
Zimbabwe