Native to:
Albania,
Algeria,
Altay,
Assam,
Austria,
Azores,
Baleares,
Baltic States,
Bangladesh,
Belarus,
Belgium,
Bulgaria,
Buryatiya,
Canary Is.,
Cape Provinces,
Cape Verde,
Central European Rus,
Chad,
China North-Central,
China South-Central,
China Southeast,
Chita,
Corse,
Cyprus,
Czechoslovakia,
Denmark,
Djibouti,
East Aegean Is.,
East European Russia,
East Himalaya,
Egypt,
Eritrea,
Ethiopia,
Finland,
France,
Free State,
Germany,
Great Britain,
Greece,
Hungary,
Iceland,
India,
Inner Mongolia,
Iran,
Iraq,
Ireland,
Irkutsk,
Italy,
Kazakhstan,
Kenya,
Kirgizstan,
Krasnoyarsk,
Kriti,
Krym,
KwaZulu-Natal,
Lebanon-Syria,
Lesotho,
Libya,
Madeira,
Manchuria,
Mongolia,
Morocco,
Myanmar,
Namibia,
Nepal,
Netherlands,
North Caucasus,
North European Russi,
Northern Provinces,
Northwest European R,
Norway,
Pakistan,
Palestine,
Poland,
Portugal,
Qinghai,
Romania,
Rwanda,
Sardegna,
Saudi Arabia,
Sicilia,
Somalia,
South European Russi,
Spain,
Sudan,
Swaziland,
Sweden,
Switzerland,
Tadzhikistan,
Tanzania,
Tibet,
Transcaucasus,
Tunisia,
Turkey,
Turkey-in-Europe,
Turkmenistan,
Tuva,
Uganda,
Ukraine,
Uzbekistan,
West Himalaya,
West Siberia,
Xinjiang,
Yakutskiya,
Yemen,
Yugoslavia,
Zambia,
Zaïre,
Zimbabwe
Introduced into:
Alabama,
Alberta,
Argentina Northeast,
Argentina Northwest,
Argentina South,
Arizona,
Bolivia,
Brazil South,
Brazil Southeast,
British Columbia,
California,
Chile Central,
Chile North,
Chile South,
Colorado,
Connecticut,
Delaware,
District of Columbia,
Florida,
Georgia,
Illinois,
Indiana,
Iowa,
Japan,
Juan Fernández Is.,
Kansas,
Kentucky,
Korea,
Maine,
Maryland,
Mauritius,
Michigan,
Missouri,
Montana,
Nebraska,
Nevada,
New Jersey,
New Mexico,
New York,
New Zealand North,
North Carolina,
North Dakota,
Ohio,
Oklahoma,
Ontario,
Oregon,
Pennsylvania,
Peru,
Primorye,
Rhode I.,
South Dakota,
St.Helena,
Tennessee,
Texas,
Uruguay,
Utah,
Vermont,
Virginia,
Washington,
West Virginia,
Wisconsin,
Wyoming