Native to:
Albania,
Austria,
Azores,
Baltic States,
Belarus,
Belgium,
Bulgaria,
Canary Is.,
Corse,
Czechoslovakia,
Denmark,
France,
Germany,
Great Britain,
Hungary,
Ireland,
Italy,
Netherlands,
North European Russia,
Northwest European Russia,
Norway,
Poland,
Portugal,
Romania,
Sicilia,
Spain,
Sweden,
Switzerland,
Transcaucasus,
Ukraine,
West Himalaya,
Yugoslavia
Introduced into:
Alaska,
Alberta,
Arkansas,
Bolivia,
British Columbia,
California,
Cape Provinces,
Chatham Is.,
Colombia,
Colorado,
Connecticut,
Costa Rica,
Delaware,
District of Columbia,
Ecuador,
Hawaii,
Idaho,
Illinois,
Indiana,
Iowa,
Juan Fernández Is.,
Kentucky,
KwaZulu-Natal,
Madeira,
Maine,
Maryland,
Massachusetts,
Mexico Gulf,
Michigan,
Mississippi,
Missouri,
Montana,
Nevada,
New Brunswick,
New Hampshire,
New Jersey,
New South Wales,
New York,
New Zealand North,
North Carolina,
North Dakota,
Nova Scotia,
Ohio,
Ontario,
Oregon,
Pennsylvania,
Peru,
Québec,
Rhode I.,
South Australia,
Tasmania,
Tennessee,
Texas,
Tristan da Cunha,
Utah,
Vermont,
Victoria,
Virginia,
Washington,
West Virginia,
Western Australia,
Wisconsin