Native to:
Alaska,
Albania,
Alberta,
Aleutian Is.,
Altay,
Amur,
Austria,
Baltic States,
Belarus,
Belgium,
British Columbia,
Bulgaria,
Buryatiya,
California,
Central European Rus,
Chita,
Czechoslovakia,
Denmark,
East European Russia,
Finland,
France,
Føroyar,
Germany,
Great Britain,
Greece,
Greenland,
Iceland,
Idaho,
Inner Mongolia,
Irkutsk,
Italy,
Japan,
Kamchatka,
Kazakhstan,
Khabarovsk,
Korea,
Krasnoyarsk,
Kuril Is.,
Labrador,
Magadan,
Maine,
Manchuria,
Manitoba,
Michigan,
Minnesota,
Mongolia,
Montana,
Netherlands,
Nevada,
New Brunswick,
New Hampshire,
New York,
Newfoundland,
North European Russi,
Northwest European R,
Northwest Territorie,
Norway,
Nova Scotia,
Nunavut,
Ontario,
Oregon,
Poland,
Primorye,
Prince Edward I.,
Québec,
Romania,
Sakhalin,
Saskatchewan,
Spain,
Svalbard,
Sweden,
Switzerland,
Transcaucasus,
Turkey,
Tuva,
Ukraine,
Utah,
Vermont,
Washington,
West Siberia,
Wyoming,
Yakutskiya,
Yugoslavia,
Yukon