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