Native to:
Afghanistan,
Algeria,
Austria,
Baltic States,
Belarus,
Belgium,
Bulgaria,
Central European Rus,
Czechoslovakia,
Denmark,
East European Russia,
Finland,
France,
Føroyar,
Germany,
Great Britain,
Greece,
Iceland,
Ireland,
Italy,
Kirgizstan,
Nepal,
Netherlands,
North Caucasus,
North European Russi,
Northwest European R,
Norway,
Poland,
Portugal,
Romania,
Sicilia,
Spain,
Sweden,
Switzerland,
Turkey,
Ukraine,
Uzbekistan,
West Himalaya,
Yugoslavia
Introduced into:
Alaska,
Alberta,
Amur,
Antipodean Is.,
Argentina Northeast,
Argentina South,
Arizona,
Azores,
British Columbia,
California,
Canary Is.,
Chatham Is.,
Chile South,
Colorado,
Connecticut,
Crozet Is.,
District of Columbia,
Ecuador,
Falkland Is.,
Greenland,
Gulf of Guinea Is.,
Illinois,
Iowa,
Kerguelen,
Kuril Is.,
Labrador,
Maine,
Malaya,
Marion-Prince Edward,
Maryland,
Massachusetts,
Mexico Northeast,
Michigan,
Minnesota,
Montana,
Nevada,
New Brunswick,
New Hampshire,
New Jersey,
New Mexico,
New South Wales,
New York,
New Zealand North,
New Zealand South,
Newfoundland,
North Dakota,
Nova Scotia,
Ohio,
Oklahoma,
Ontario,
Oregon,
Pennsylvania,
Primorye,
Prince Edward I.,
Queensland,
Québec,
Rhode I.,
Sakhalin,
Saskatchewan,
South Australia,
South Dakota,
South Georgia,
Tasmania,
Texas,
Utah,
Vermont,
Victoria,
Virginia,
Washington,
West Virginia,
Western Australia,
Wisconsin,
Wyoming,
Yukon