Native to:
Alaska,
Albania,
Alberta,
Aleutian Is.,
Algeria,
Altay,
Amur,
Austria,
Baleares,
Baltic States,
Belarus,
Belgium,
British Columbia,
Bulgaria,
Buryatiya,
California,
Canary Is.,
Central European Rus,
China North-Central,
China South-Central,
China Southeast,
Chita,
Colorado,
Connecticut,
Corse,
Czechoslovakia,
Denmark,
East European Russia,
Finland,
France,
Germany,
Great Britain,
Greece,
Hungary,
Idaho,
Illinois,
Indiana,
Inner Mongolia,
Iowa,
Iran,
Ireland,
Irkutsk,
Italy,
Japan,
Kamchatka,
Kazakhstan,
Khabarovsk,
Kirgizstan,
Korea,
Krasnoyarsk,
Krym,
Kuril Is.,
Labrador,
Magadan,
Maine,
Manchuria,
Manitoba,
Maryland,
Massachusetts,
Michigan,
Minnesota,
Missouri,
Mongolia,
Montana,
Morocco,
Nebraska,
Netherlands,
Nevada,
New Brunswick,
New Hampshire,
New Jersey,
New Mexico,
New York,
Newfoundland,
North Caucasus,
North Dakota,
North European Russi,
Northwest European R,
Northwest Territorie,
Norway,
Nova Scotia,
Nunavut,
Ohio,
Ontario,
Oregon,
Pennsylvania,
Poland,
Portugal,
Primorye,
Prince Edward I.,
Québec,
Rhode I.,
Romania,
Sakhalin,
Sardegna,
Saskatchewan,
Sicilia,
South Dakota,
South European Russi,
Spain,
Sweden,
Switzerland,
Taiwan,
Transcaucasus,
Tunisia,
Turkey,
Turkey-in-Europe,
Tuva,
Ukraine,
Utah,
Uzbekistan,
Vermont,
Virginia,
Washington,
West Siberia,
West Virginia,
Wisconsin,
Wyoming,
Xinjiang,
Yakutskiya,
Yugoslavia,
Yukon