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 Russia,
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 Russia,
Northwest European Russia,
Northwest Territories,
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 Russia,
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