Native to:
Afghanistan,
Alaska,
Albania,
Alberta,
Aleutian Is.,
Altay,
Arizona,
Austria,
British Columbia,
Bulgaria,
California,
China North-Central,
China South-Central,
Chita,
Colorado,
Corse,
Czechoslovakia,
East European Russia,
East Himalaya,
Finland,
France,
Føroyar,
Germany,
Great Britain,
Greece,
Greenland,
Iceland,
Idaho,
Iran,
Iraq,
Ireland,
Irkutsk,
Italy,
Japan,
Kamchatka,
Kazakhstan,
Khabarovsk,
Kirgizstan,
Korea,
Krasnoyarsk,
Kuril Is.,
Labrador,
Lebanon-Syria,
Magadan,
Manchuria,
Mongolia,
Montana,
Nepal,
Nevada,
New Hampshire,
New Mexico,
Newfoundland,
North Caucasus,
North European Russi,
Norway,
Nova Scotia,
Nunavut,
Oregon,
Pakistan,
Poland,
Québec,
Romania,
Sakhalin,
South Dakota,
Spain,
Svalbard,
Sweden,
Switzerland,
Tadzhikistan,
Tibet,
Transcaucasus,
Turkey,
Tuva,
Ukraine,
Utah,
Uzbekistan,
Washington,
West Himalaya,
West Siberia,
Wyoming,
Xinjiang,
Yakutskiya,
Yugoslavia,
Yukon