Native to:
Alaska,
Albania,
Alberta,
Austria,
Baltic States,
British Columbia,
Bulgaria,
Buryatiya,
Central European Russia,
Colorado,
Czechoslovakia,
Denmark,
East European Russia,
Finland,
France,
Føroyar,
Germany,
Great Britain,
Greenland,
Iceland,
Idaho,
Ireland,
Irkutsk,
Italy,
Japan,
Kamchatka,
Krasnoyarsk,
Kuril Is.,
Labrador,
Maine,
Manitoba,
Michigan,
Minnesota,
Montana,
Nevada,
New Brunswick,
Newfoundland,
North Caucasus,
North European Russia,
Northwest European Russia,
Northwest Territories,
Norway,
Nova Scotia,
Ontario,
Poland,
Prince Edward I.,
Québec,
Romania,
Saskatchewan,
Spain,
Sweden,
Switzerland,
Transcaucasus,
Tuva,
Ukraine,
West Siberia,
Wisconsin,
Wyoming,
Yakutskiya,
Yugoslavia,
Yukon