Native to:
Afghanistan,
Albania,
Algeria,
Assam,
Austria,
Baleares,
Baltic States,
Belarus,
Belgium,
British Columbia,
Bulgaria,
California,
Central European Rus,
China North-Central,
China South-Central,
China Southeast,
Corse,
Cyprus,
Czechoslovakia,
Denmark,
East Aegean Is.,
East European Russia,
East Himalaya,
Finland,
France,
Germany,
Great Britain,
Greece,
Hungary,
Idaho,
Iran,
Iraq,
Ireland,
Italy,
Japan,
Kazakhstan,
Kirgizstan,
Korea,
Kriti,
Krym,
Kuril Is.,
Laos,
Lebanon-Syria,
Manchuria,
Morocco,
Myanmar,
Nepal,
Netherlands,
North Caucasus,
Northwest European R,
Norway,
Oregon,
Pakistan,
Palestine,
Poland,
Portugal,
Primorye,
Romania,
Sakhalin,
Sardegna,
Sicilia,
South European Russi,
Spain,
Sweden,
Switzerland,
Tadzhikistan,
Taiwan,
Thailand,
Tibet,
Transcaucasus,
Tunisia,
Turkey,
Turkey-in-Europe,
Turkmenistan,
Ukraine,
Uzbekistan,
Washington,
West Himalaya,
West Siberia,
Yugoslavia