Native to:
Albania,
Alberta,
Algeria,
Argentina Northeast,
Austria,
Baltic States,
Belarus,
Belgium,
British Columbia,
Bulgaria,
Central European Russia,
China South-Central,
Connecticut,
Corse,
Costa Rica,
Czechoslovakia,
Delaware,
Denmark,
East European Russia,
East Himalaya,
Falkland Is.,
Finland,
France,
Føroyar,
Germany,
Great Britain,
Greece,
Greenland,
Hungary,
Iceland,
Illinois,
Indiana,
Iowa,
Iran,
Ireland,
Italy,
Japan,
Kazakhstan,
Kentucky,
Khabarovsk,
Kirgizstan,
Korea,
Krym,
Maine,
Manitoba,
Maryland,
Massachusetts,
Michigan,
Minnesota,
Montana,
Morocco,
Netherlands,
New Brunswick,
New Hampshire,
New Jersey,
New York,
Newfoundland,
North Caucasus,
North Dakota,
North European Russia,
Northwest European Russia,
Norway,
Nova Scotia,
Ohio,
Ontario,
Oregon,
Pennsylvania,
Poland,
Portugal,
Primorye,
Prince Edward I.,
Québec,
Romania,
Sakhalin,
South Dakota,
South European Russia,
Spain,
Sweden,
Switzerland,
Tadzhikistan,
Tennessee,
Tibet,
Transcaucasus,
Tunisia,
Turkey,
Turkey-in-Europe,
Turkmenistan,
Ukraine,
Uzbekistan,
Vermont,
Virginia,
West Himalaya,
West Siberia,
West Virginia,
Wisconsin,
Yugoslavia
Introduced into:
Azores,
Canary Is.,
Kerguelen,
Madeira,
New Zealand North,
New Zealand South,
Taiwan,
Tasmania