Native to:
Albania,
Algeria,
Austria,
Azores,
Baleares,
Baltic States,
Belarus,
Belgium,
Bulgaria,
Buryatiya,
Canary Is.,
Central European Rus,
Corse,
Czechoslovakia,
Denmark,
East Aegean Is.,
East European Russia,
Finland,
France,
Føroyar,
Germany,
Great Britain,
Greece,
Hungary,
Iceland,
Ireland,
Italy,
Kazakhstan,
Kirgizstan,
Kriti,
Krym,
Lebanon-Syria,
Madeira,
Mongolia,
Morocco,
Netherlands,
North Caucasus,
North European Russi,
Northwest European R,
Norway,
Poland,
Portugal,
Romania,
Sardegna,
Sicilia,
South European Russi,
Spain,
Sweden,
Switzerland,
Transcaucasus,
Tunisia,
Turkey,
Turkey-in-Europe,
Ukraine,
West Siberia,
Yugoslavia
Introduced into:
Alabama,
Alaska,
Aleutian Is.,
Amsterdam-St.Paul Is,
Antipodean Is.,
Argentina Northeast,
Argentina South,
Arkansas,
Assam,
Bolivia,
Brazil South,
Brazil Southeast,
British Columbia,
California,
Cape Provinces,
Chatham Is.,
Chile Central,
Chile South,
China Southeast,
Colombia,
Colorado,
Connecticut,
Costa Rica,
Delaware,
District of Columbia,
Dominican Republic,
East Himalaya,
Ecuador,
Falkland Is.,
Georgia,
Greenland,
Haiti,
Hawaii,
Idaho,
Illinois,
Indiana,
Jamaica,
Japan,
Juan Fernández Is.,
Kentucky,
Kerguelen,
Kermadec Is.,
Korea,
Kuril Is.,
KwaZulu-Natal,
Louisiana,
Macquarie Is.,
Madagascar,
Maine,
Marquesas,
Maryland,
Massachusetts,
Mexico Central,
Mexico Northeast,
Mexico Southeast,
Mexico Southwest,
Michigan,
Mississippi,
Missouri,
New Brunswick,
New Hampshire,
New Jersey,
New Mexico,
New South Wales,
New York,
New Zealand North,
New Zealand South,
Newfoundland,
Norfolk Is.,
North Carolina,
Northern Provinces,
Nova Scotia,
Ohio,
Ontario,
Oregon,
Pakistan,
Pennsylvania,
Peru,
Prince Edward I.,
Queensland,
Québec,
Rhode I.,
Réunion,
Sakhalin,
South Australia,
South Carolina,
South Georgia,
Sri Lanka,
St.Helena,
Taiwan,
Tasmania,
Tennessee,
Texas,
Tristan da Cunha,
Uruguay,
Venezuela,
Vermont,
Victoria,
Virginia,
Washington,
West Himalaya,
West Virginia,
Western Australia,
Wisconsin