Native to:
Afghanistan,
Alabama,
Alaska,
Albania,
Altay,
Amur,
Arkansas,
Assam,
Austria,
Baltic States,
Belgium,
British Columbia,
Bulgaria,
Buryatiya,
California,
Central European Rus,
China North-Central,
China South-Central,
China Southeast,
Chita,
Corse,
Czechoslovakia,
Delaware,
Denmark,
District of Columbia,
East European Russia,
East Himalaya,
Finland,
Florida,
France,
Georgia,
Germany,
Great Britain,
Greece,
Hungary,
Illinois,
Indiana,
Inner Mongolia,
Iowa,
Iran,
Ireland,
Irkutsk,
Italy,
Japan,
Kansas,
Kazakhstan,
Kentucky,
Khabarovsk,
Kirgizstan,
Korea,
Krasnoyarsk,
Krym,
Louisiana,
Manchuria,
Maryland,
Michigan,
Minnesota,
Mississippi,
Missouri,
Mongolia,
Myanmar,
Nebraska,
Nepal,
Netherlands,
New Jersey,
New York,
North Carolina,
North Caucasus,
North European Russi,
Northwest European R,
Norway,
Ohio,
Oklahoma,
Ontario,
Oregon,
Pakistan,
Pennsylvania,
Poland,
Portugal,
Primorye,
Qinghai,
Romania,
Sakhalin,
Sardegna,
Sicilia,
South Carolina,
South Dakota,
South European Russi,
Spain,
Sweden,
Switzerland,
Tadzhikistan,
Tennessee,
Texas,
Tibet,
Transcaucasus,
Turkey,
Turkey-in-Europe,
Turkmenistan,
Ukraine,
Uzbekistan,
Virginia,
Washington,
West Himalaya,
West Siberia,
West Virginia,
Wisconsin,
Xinjiang,
Yugoslavia
Introduced into:
Argentina Northeast,
Argentina South,
Azores,
Baleares,
Belarus,
Colorado,
Connecticut,
Cyprus,
Ecuador,
Falkland Is.,
Iraq,
Madeira,
Maine,
Manitoba,
Massachusetts,
Montana,
Nevada,
New Brunswick,
New Hampshire,
New Mexico,
New South Wales,
Newfoundland,
North Dakota,
Nova Scotia,
Prince Edward I.,
Queensland,
Québec,
Rhode I.,
Taiwan,
Tasmania,
Utah,
Vermont,
Victoria,
Wyoming