Native to:
Afghanistan,
Albania,
Algeria,
Assam,
Austria,
Azores,
Baltic States,
Belarus,
Belgium,
Bulgaria,
Cameroon,
Cape Provinces,
Central European Rus,
China North-Central,
China South-Central,
China Southeast,
Corse,
Czechoslovakia,
Denmark,
East European Russia,
East Himalaya,
Egypt,
Ethiopia,
France,
Free State,
Føroyar,
Germany,
Great Britain,
Greece,
Gulf of Guinea Is.,
Hungary,
Iceland,
Inner Mongolia,
Iran,
Ireland,
Italy,
Kazakhstan,
Kenya,
Kirgizstan,
KwaZulu-Natal,
Lebanon-Syria,
Lesotho,
Madeira,
Morocco,
Myanmar,
Namibia,
Nepal,
Netherlands,
North Caucasus,
Northern Provinces,
Northwest European R,
Norway,
Pakistan,
Poland,
Portugal,
Qinghai,
Romania,
Rwanda,
Saudi Arabia,
Sicilia,
South European Russi,
Spain,
Sweden,
Switzerland,
Tadzhikistan,
Tanzania,
Thailand,
Tibet,
Transcaucasus,
Turkey,
Uganda,
Ukraine,
Uzbekistan,
West Himalaya,
Xinjiang,
Yemen,
Yugoslavia,
Zaïre
Introduced into:
Bolivia,
British Columbia,
California,
Costa Rica,
Ecuador,
New Jersey,
New Zealand North,
Oregon,
Pennsylvania,
Tasmania,
Washington