Doubtfully present in:
Albania
Native to:
Algeria,
Austria,
Azores,
Baltic States,
Belarus,
Belgium,
Canary Is.,
Corse,
Czechoslovakia,
Denmark,
East Aegean Is.,
France,
Føroyar,
Germany,
Great Britain,
Greece,
Hungary,
Iceland,
Ireland,
Italy,
Lebanon-Syria,
Madeira,
Netherlands,
North Caucasus,
Norway,
Poland,
Portugal,
Romania,
Sardegna,
Spain,
Sweden,
Switzerland,
Tunisia,
Turkey,
Turkey-in-Europe,
Ukraine,
Yugoslavia
Introduced into:
Alabama,
Argentina South,
Arkansas,
British Columbia,
California,
Cape Provinces,
Chile South,
Colombia,
Delaware,
Ecuador,
Falkland Is.,
Georgia,
Hawaii,
Idaho,
Kerguelen,
Louisiana,
Maryland,
Massachusetts,
Michigan,
Mississippi,
Montana,
Nevada,
New Jersey,
New York,
New Zealand North,
North Carolina,
Nova Scotia,
Ohio,
Ontario,
Oregon,
Pennsylvania,
Québec,
Réunion,
South Carolina,
Tasmania,
Tristan da Cunha,
Virginia,
Washington,
Wisconsin