Native to:
Austria,
Baltic States,
Belarus,
Belgium,
Central European Russia,
Czechoslovakia,
Denmark,
East European Russia,
Finland,
France,
Føroyar,
Germany,
Great Britain,
Hungary,
Ireland,
Italy,
Netherlands,
North European Russia,
Northwest European Russia,
Norway,
Poland,
Romania,
South European Russia,
Spain,
Sweden,
Switzerland,
Ukraine,
Yugoslavia
Introduced into:
Alaska,
Alberta,
Connecticut,
Greenland,
Iceland,
Idaho,
Indiana,
Jawa,
Labrador,
Maine,
Manitoba,
Maryland,
Massachusetts,
Michigan,
Minnesota,
Montana,
New Brunswick,
New Hampshire,
New Jersey,
New York,
Newfoundland,
Nova Scotia,
Ohio,
Ontario,
Pennsylvania,
Prince Edward I.,
Québec,
Rhode I.,
South Georgia,
Vermont,
Washington,
West Virginia,
Wisconsin