Native to:
Afghanistan,
Alaska,
Albania,
Alberta,
Aleutian Is.,
Altay,
Argentina Northeast,
Argentina Northwest,
Argentina South,
Arizona,
Austria,
British Columbia,
Bulgaria,
California,
Chile Central,
Chile South,
China North-Central,
China South-Central,
China Southeast,
Colorado,
Czechoslovakia,
East European Russia,
East Himalaya,
Finland,
France,
Føroyar,
Germany,
Great Britain,
Greece,
Greenland,
Guatemala,
Iceland,
Idaho,
Iran,
Iraq,
Italy,
Japan,
Kamchatka,
Kazakhstan,
Kirgizstan,
Korea,
Krasnoyarsk,
Kuril Is.,
Labrador,
Lebanon-Syria,
Maine,
Manchuria,
Mexico Central,
Mexico Gulf,
Mexico Northeast,
Mexico Southeast,
Michigan,
Mongolia,
Montana,
Nepal,
Nevada,
New Brunswick,
New Hampshire,
New Mexico,
Newfoundland,
North Caucasus,
North European Russi,
Northwest European R,
Northwest Territorie,
Norway,
Nova Scotia,
Ontario,
Oregon,
Pakistan,
Poland,
Québec,
Romania,
Saskatchewan,
South Dakota,
South Georgia,
Spain,
Sweden,
Switzerland,
Tadzhikistan,
Taiwan,
Tibet,
Transcaucasus,
Turkey,
Tuva,
Ukraine,
Utah,
Uzbekistan,
Washington,
West Himalaya,
West Siberia,
Wyoming,
Xinjiang,
Yugoslavia,
Yukon