Doubtfully present in:
Sardegna
Native to:
Albania,
Baltic States,
Belarus,
Bulgaria,
Central European Rus,
Corse,
France,
Greece,
Italy,
Poland,
Romania,
Switzerland,
Turkey,
Turkey-in-Europe,
Ukraine,
Yugoslavia
Introduced into:
Altay,
Amur,
Austria,
Azores,
Belgium,
British Columbia,
California,
Chita,
Colombia,
Connecticut,
Czechoslovakia,
Delaware,
Denmark,
District of Columbia,
Dominican Republic,
East Himalaya,
Ecuador,
Egypt,
Finland,
Florida,
Germany,
Great Britain,
Hawaii,
Hungary,
Illinois,
Indiana,
Jamaica,
Japan,
Kentucky,
Khabarovsk,
Korea,
Madeira,
Maine,
Maryland,
Massachusetts,
Mauritius,
Michigan,
Minnesota,
Missouri,
Mozambique,
Nansei-shoto,
New Brunswick,
New Hampshire,
New Jersey,
New York,
North Carolina,
Norway,
Nova Scotia,
Ohio,
Ontario,
Oregon,
Pennsylvania,
Primorye,
Québec,
Réunion,
Sakhalin,
South Carolina,
Spain,
Sri Lanka,
Sweden,
Utah,
Uzbekistan,
Vermont,
Virginia,
Washington,
West Himalaya,
West Virginia,
Wisconsin