Native to:
Albania,
Alberta,
Altay,
Austria,
Baltic States,
Belarus,
Belgium,
British Columbia,
Bulgaria,
Buryatiya,
Central European Russia,
Colorado,
Czechoslovakia,
Denmark,
East European Russia,
Finland,
France,
Føroyar,
Germany,
Great Britain,
Greece,
Iceland,
Illinois,
Iran,
Ireland,
Irkutsk,
Italy,
Kazakhstan,
Kirgizstan,
Krasnoyarsk,
Labrador,
Manitoba,
Maryland,
Massachusetts,
Michigan,
Minnesota,
Mongolia,
Montana,
Netherlands,
New Brunswick,
New Hampshire,
New Jersey,
New Mexico,
New York,
Newfoundland,
North Caucasus,
North Dakota,
North European Russia,
Northwest European Russia,
Norway,
Nova Scotia,
Nunavut,
Ohio,
Ontario,
Pennsylvania,
Poland,
Prince Edward I.,
Rhode I.,
Romania,
South Dakota,
South European Russia,
Spain,
Sweden,
Switzerland,
Transcaucasus,
Turkey,
Ukraine,
Uzbekistan,
Vermont,
Washington,
West Siberia,
West Virginia,
Wisconsin,
Wyoming,
Xinjiang,
Yugoslavia