Native to:
Alaska,
Albania,
Alberta,
Algeria,
Altay,
Arizona,
Austria,
Azores,
Baltic States,
Belarus,
Belgium,
British Columbia,
Bulgaria,
California,
Central European Russia,
Colorado,
Connecticut,
Corse,
Czechoslovakia,
Denmark,
East European Russia,
Finland,
France,
Føroyar,
Germany,
Great Britain,
Greece,
Hungary,
Idaho,
Ireland,
Italy,
Kazakhstan,
Madeira,
Maine,
Manitoba,
Massachusetts,
Michigan,
Minnesota,
Montana,
Morocco,
Netherlands,
Nevada,
New Brunswick,
New Hampshire,
New Mexico,
New York,
Newfoundland,
North Dakota,
North European Russia,
Northwest European Russia,
Northwest Territories,
Norway,
Nova Scotia,
Ontario,
Oregon,
Pennsylvania,
Poland,
Portugal,
Prince Edward I.,
Québec,
Romania,
Sardegna,
Saskatchewan,
Sicilia,
South European Russia,
Spain,
Sweden,
Switzerland,
Transcaucasus,
Turkey,
Ukraine,
Utah,
Vermont,
Washington,
West Siberia,
Wisconsin,
Wyoming,
Yugoslavia
Introduced into:
New South Wales,
South Australia,
Tasmania,
Victoria