Native to:
Albania,
Austria,
France,
Germany,
Italy,
Netherlands,
NW. Balkan Pen.,
Spain,
Switzerland
Introduced into:
Alabama,
Alberta,
Bahamas,
Baltic States,
Belarus,
Belgium,
British Columbia,
California,
Central European Russia,
Connecticut,
Czechia-Slovakia,
Denmark,
East European Russia,
Ecuador,
Florida,
Great Britain,
Greece,
Hungary,
Idaho,
Illinois,
Indiana,
Iowa,
Ireland,
Japan,
Kansas,
Kentucky,
Korea,
Krym,
Maine,
Manitoba,
Maryland,
Massachusetts,
Michigan,
Minnesota,
Missouri,
Montana,
New Brunswick,
New Hampshire,
New York,
Newfoundland,
North Dakota,
Northwest European Russia,
Northwest Territories,
Norway,
Nova Scotia,
Ohio,
Ontario,
Oregon,
Pennsylvania,
Poland,
Primorye,
Prince Edward I.,
Québec,
Romania,
Saskatchewan,
South Dakota,
South European Russia,
Sweden,
Texas,
Ukraine,
Vermont,
Washington,
West Siberia,
West Virginia,
Wisconsin,
Wyoming