Native to:
Afghanistan,
Alaska,
Albania,
Alberta,
Aleutian Is.,
Algeria,
Argentina Northwest,
Argentina South,
Austria,
Baltic States,
Belarus,
Belgium,
British Columbia,
California,
Central European Rus,
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 Russi,
Northwest European R,
Northwest Territorie,
Norway,
Nova Scotia,
Nunavut,
Ontario,
Oregon,
Palestine,
Poland,
Portugal,
Prince Edward I.,
Québec,
Rhode I.,
Romania,
Sardegna,
Saskatchewan,
Sicilia,
South European Russi,
Spain,
Sweden,
Switzerland,
Transcaucasus,
Turkey,
Turkey-in-Europe,
Turkmenistan,
Ukraine,
Virginia,
Washington,
Yugoslavia,
Yukon