Native to:
Afghanistan,
Alaska,
Albania,
Alberta,
Aleutian Is.,
Algeria,
Argentina Northwest,
Argentina South,
Austria,
Baltic States,
Belarus,
Belgium,
British Columbia,
California,
Central European Russia,
Chile South,
Connecticut,
Corse,
Cyprus,
Czechoslovakia,
Denmark,
East European Russia,
Finland,
France,
Føroyar,
Germany,
Great Britain,
Greenland,
Hungary,
Iceland,
Iran,
Ireland,
Italy,
Kirgizstan,
Krym,
Labrador,
Maine,
Manitoba,
Massachusetts,
Morocco,
Netherlands,
New Brunswick,
New Hampshire,
New Jersey,
New York,
Newfoundland,
North Caucasus,
North European Russia,
Northwest European Russia,
Northwest Territories,
Norway,
Nova Scotia,
Nunavut,
Ontario,
Oregon,
Palestine,
Poland,
Portugal,
Prince Edward I.,
Québec,
Rhode I.,
Romania,
Sardegna,
Saskatchewan,
Sicilia,
South European Russia,
Spain,
Sweden,
Switzerland,
Transcaucasus,
Turkey,
Turkey-in-Europe,
Turkmenistan,
Ukraine,
Virginia,
Washington,
Yugoslavia,
Yukon