Native to:
Afghanistan,
Albania,
Alberta,
Algeria,
Altay,
Argentina South,
Arizona,
Arkansas,
Austria,
Baltic States,
Belarus,
Belgium,
British Columbia,
Bulgaria,
Buryatiya,
Central European Rus,
Chile South,
China North-Central,
China South-Central,
Chita,
Colorado,
Corse,
Czechoslovakia,
Denmark,
East European Russia,
East Himalaya,
Finland,
France,
Føroyar,
Germany,
Great Britain,
Greece,
Greenland,
Hungary,
Iceland,
Idaho,
Inner Mongolia,
Iowa,
Iran,
Iraq,
Ireland,
Italy,
Kazakhstan,
Kirgizstan,
Krasnoyarsk,
Krym,
Labrador,
Lebanon-Syria,
Libya,
Manitoba,
Mongolia,
Montana,
Morocco,
Nebraska,
Nepal,
Netherlands,
Nevada,
New Brunswick,
New Mexico,
Newfoundland,
North Caucasus,
North Dakota,
North European Russi,
Northwest European R,
Norway,
Ontario,
Oregon,
Pakistan,
Palestine,
Poland,
Prince Edward I.,
Qinghai,
Québec,
Romania,
Sardegna,
Saskatchewan,
Sicilia,
South Dakota,
South European Russi,
Spain,
Sweden,
Switzerland,
Tadzhikistan,
Tibet,
Transcaucasus,
Turkey,
Turkey-in-Europe,
Turkmenistan,
Tuva,
Ukraine,
Utah,
Uzbekistan,
Washington,
West Himalaya,
West Siberia,
Wisconsin,
Wyoming,
Xinjiang,
Yugoslavia