Native to:
Albania,
Algeria,
Austria,
Azores,
Baleares,
Baltic States,
Belgium,
Bulgaria,
Canary Is.,
Central European Rus,
Corse,
Czechoslovakia,
Denmark,
East Aegean Is.,
Egypt,
Finland,
France,
Germany,
Greece,
Hungary,
Iceland,
Iran,
Iraq,
Italy,
Kriti,
Morocco,
Netherlands,
North Caucasus,
North European Russi,
Northwest European R,
Norway,
Portugal,
Romania,
Sardegna,
Sicilia,
Sinai,
Spain,
Sweden,
Switzerland,
Tunisia,
Turkey,
Turkey-in-Europe,
Ukraine,
Yugoslavia
Introduced into:
Alabama,
Belarus,
British Columbia,
California,
Colorado,
Connecticut,
Delaware,
District of Columbia,
Falkland Is.,
Florida,
Georgia,
Great Britain,
Idaho,
Illinois,
Indiana,
Iowa,
Ireland,
Japan,
Kamchatka,
Kentucky,
Korea,
KwaZulu-Natal,
Louisiana,
Maine,
Maryland,
Massachusetts,
Minnesota,
Mississippi,
Missouri,
Nansei-shoto,
Nebraska,
New Brunswick,
New Hampshire,
New Jersey,
New South Wales,
New York,
Newfoundland,
North Carolina,
North Dakota,
Nova Scotia,
Ohio,
Ontario,
Oregon,
Pakistan,
Pennsylvania,
Poland,
Primorye,
Prince Edward I.,
Québec,
Rhode I.,
South Carolina,
Tasmania,
Tennessee,
Uruguay,
Vermont,
Virginia,
Washington,
West Virginia,
Wisconsin,
Wyoming