Native to:
Afghanistan,
Alaska,
Albania,
Alberta,
Aleutian Is.,
Altay,
Amur,
Arizona,
Assam,
Austria,
British Columbia,
Bulgaria,
Buryatiya,
California,
China North-Central,
China South-Central,
China Southeast,
Chita,
Colorado,
Czechoslovakia,
East European Russia,
East Himalaya,
Finland,
France,
Føroyar,
Germany,
Great Britain,
Greenland,
Iceland,
Idaho,
Inner Mongolia,
Iran,
Ireland,
Irkutsk,
Italy,
Japan,
Kamchatka,
Kazakhstan,
Khabarovsk,
Kirgizstan,
Korea,
Krasnoyarsk,
Kuril Is.,
Labrador,
Magadan,
Maine,
Manchuria,
Minnesota,
Mongolia,
Montana,
Myanmar,
Nepal,
Nevada,
New Brunswick,
New Mexico,
New York,
Newfoundland,
North Carolina,
North European Russi,
Norway,
Nova Scotia,
Oregon,
Pakistan,
Pennsylvania,
Poland,
Primorye,
Qinghai,
Québec,
Romania,
Sakhalin,
Spain,
Svalbard,
Sweden,
Switzerland,
Tadzhikistan,
Tibet,
Tuva,
Ukraine,
Utah,
Uzbekistan,
Vermont,
Washington,
West Himalaya,
West Siberia,
Wyoming,
Xinjiang,
Yakutskiya,
Yugoslavia,
Yukon