Native to:
Alabama,
Albania,
Algeria,
Angola,
Argentina Northeast,
Argentina Northwest,
Arkansas,
Assam,
Azores,
Bahamas,
Belgium,
Bermuda,
Bolivia,
Borneo,
Brazil Northeast,
Brazil South,
Brazil Southeast,
Brazil West-Central,
Bulgaria,
Burkina,
Burundi,
Cambodia,
Cameroon,
Cape Provinces,
Cape Verde,
Central African Repu,
China North-Central,
China South-Central,
China Southeast,
Colombia,
Connecticut,
Corse,
Costa Rica,
Cuba,
Czechoslovakia,
Delaware,
Denmark,
District of Columbia,
East Himalaya,
Ecuador,
Ethiopia,
Florida,
France,
Free State,
Georgia,
Germany,
Great Britain,
Greece,
Guatemala,
Guinea,
Gulf of Guinea Is.,
Hainan,
Honduras,
Hungary,
Illinois,
India,
Indiana,
Iowa,
Iran,
Ireland,
Italy,
Jamaica,
Japan,
Jawa,
Kamchatka,
Kansas,
Kentucky,
Kenya,
Korea,
Kriti,
Kuril Is.,
KwaZulu-Natal,
Labrador,
Laos,
Lebanon-Syria,
Lesotho,
Liberia,
Louisiana,
Madagascar,
Maine,
Malawi,
Malaya,
Mali,
Manchuria,
Manitoba,
Maryland,
Massachusetts,
Mauritius,
Mexico Central,
Mexico Gulf,
Mexico Northeast,
Mexico Southeast,
Mexico Southwest,
Michigan,
Minnesota,
Mississippi,
Missouri,
Morocco,
Mozambique,
Myanmar,
Nansei-shoto,
Nepal,
Netherlands,
New Brunswick,
New Hampshire,
New Jersey,
New York,
Newfoundland,
Nicaragua,
Nigeria,
North Carolina,
North Caucasus,
Northern Provinces,
Norway,
Nova Scotia,
Ogasawara-shoto,
Ohio,
Oklahoma,
Ontario,
Pakistan,
Palestine,
Paraguay,
Pennsylvania,
Peru,
Philippines,
Poland,
Portugal,
Primorye,
Prince Edward I.,
Québec,
Rhode I.,
Rwanda,
Réunion,
Sakhalin,
Sardegna,
Sicilia,
Sierra Leone,
South Carolina,
Spain,
Sudan,
Sulawesi,
Sumatera,
Swaziland,
Sweden,
Switzerland,
Taiwan,
Tanzania,
Tennessee,
Texas,
Thailand,
Tibet,
Transcaucasus,
Tunisia,
Turkey,
Turkey-in-Europe,
Uganda,
Uruguay,
Venezuela,
Vermont,
Vietnam,
Virginia,
West Himalaya,
West Virginia,
Wisconsin,
Yugoslavia,
Zambia,
Zaïre,
Zimbabwe
Introduced into:
Austria,
Madeira,
New Zealand North,
Sri Lanka