Doubtfully present in:
Nepal
Native to:
Albania,
Austria,
Baltic States,
Belarus,
Belgium,
Bulgaria,
Central European Rus,
Corse,
Czechoslovakia,
Denmark,
East European Russia,
Finland,
France,
Germany,
Great Britain,
Greece,
Hungary,
Ireland,
Italy,
Krym,
Netherlands,
North European Russi,
Northwest European R,
Norway,
Poland,
Portugal,
Romania,
Sardegna,
South European Russi,
Spain,
Sweden,
Switzerland,
Ukraine,
West Siberia,
Yugoslavia
Introduced into:
Alaska,
Alberta,
Bangladesh,
British Columbia,
California,
Connecticut,
Idaho,
Illinois,
Iowa,
Kentucky,
Kuril Is.,
Labrador,
Louisiana,
Maine,
Manitoba,
Maryland,
Massachusetts,
Michigan,
Minnesota,
Missouri,
Montana,
New Brunswick,
New Hampshire,
New Jersey,
New York,
New Zealand North,
New Zealand South,
Newfoundland,
North Dakota,
Northwest Territorie,
Nova Scotia,
Ohio,
Ontario,
Oregon,
Pennsylvania,
Primorye,
Prince Edward I.,
Québec,
Rhode I.,
Saskatchewan,
South Dakota,
Tennessee,
Vermont,
Washington,
West Himalaya,
Wisconsin