Native to:
Albania,
Assam,
Austria,
Azores,
Baltic States,
Belarus,
Belgium,
Bulgaria,
Canary Is.,
Central European Rus,
China South-Central,
Corse,
Cyprus,
Czechoslovakia,
Denmark,
East European Russia,
East Himalaya,
Finland,
France,
Føroyar,
Germany,
Great Britain,
Greece,
Hungary,
Iran,
Ireland,
Irkutsk,
Italy,
Krasnoyarsk,
Krym,
Morocco,
Nepal,
Netherlands,
North Caucasus,
North European Russi,
Northwest European R,
Norway,
Poland,
Portugal,
Romania,
Sardegna,
Sicilia,
South European Russi,
Spain,
Sweden,
Switzerland,
Tibet,
Transcaucasus,
Turkey,
Turkey-in-Europe,
Ukraine,
West Himalaya,
West Siberia,
Yugoslavia
Introduced into:
Alabama,
Argentina South,
California,
Colorado,
Connecticut,
Delaware,
Maine,
Massachusetts,
Michigan,
New Hampshire,
New York,
New Zealand South,
Newfoundland,
Nova Scotia,
Ontario,
Pennsylvania,
Rhode I.,
Vermont,
Wisconsin