Native to:
Afghanistan,
Alaska,
Albania,
Alberta,
Altay,
Arizona,
Austria,
Baltic States,
Belgium,
British Columbia,
Bulgaria,
Buryatiya,
California,
Colorado,
Corse,
Czechoslovakia,
East European Russia,
Finland,
France,
Føroyar,
Germany,
Great Britain,
Greece,
Greenland,
Hungary,
Iceland,
Idaho,
Iran,
Ireland,
Irkutsk,
Italy,
Japan,
Kamchatka,
Kazakhstan,
Krasnoyarsk,
Kriti,
Krym,
Kuril Is.,
Michigan,
Minnesota,
Montana,
Morocco,
Netherlands,
Nevada,
New York,
Newfoundland,
North Caucasus,
North European Russi,
Northwest European R,
Northwest Territorie,
Norway,
Nova Scotia,
Ontario,
Oregon,
Pakistan,
Poland,
Québec,
Romania,
Sakhalin,
South Dakota,
Spain,
Sweden,
Switzerland,
Tadzhikistan,
Transcaucasus,
Turkey,
Turkey-in-Europe,
Ukraine,
Utah,
Washington,
West Himalaya,
West Siberia,
Wisconsin,
Wyoming,
Xinjiang,
Yakutskiya,
Yugoslavia,
Yukon