Native to:
Andaman Is.,
Assam,
Bangladesh,
Bismarck Archipelago,
Borneo,
Cambodia,
China North-Central,
China South-Central,
China Southeast,
East Himalaya,
India,
Inner Mongolia,
Jawa,
Laos,
Malaya,
Maluku,
Manchuria,
Myanmar,
New Guinea,
Philippines,
Queensland,
Solomon Is.,
Sri Lanka,
Sulawesi,
Sumatera,
Taiwan,
Thailand,
Tibet,
Vietnam,
West Himalaya,
Xinjiang
Introduced into:
Afghanistan,
Alabama,
Albania,
Algeria,
Argentina Northeast,
Argentina Northwest,
Arizona,
Arkansas,
Austria,
Azores,
Belgium,
Botswana,
Bulgaria,
California,
Canary Is.,
Cape Provinces,
Chile Central,
Colorado,
Connecticut,
Corse,
Cyprus,
Czechoslovakia,
Delaware,
District of Columbia,
East Aegean Is.,
Florida,
France,
Free State,
Georgia,
Germany,
Great Britain,
Greece,
Hawaii,
Hungary,
Idaho,
Illinois,
Indiana,
Iowa,
Iran,
Iraq,
Italy,
Japan,
Kansas,
Kentucky,
Korea,
Kriti,
Krym,
KwaZulu-Natal,
Lebanon-Syria,
Lesotho,
Libya,
Louisiana,
Madeira,
Maine,
Maryland,
Massachusetts,
Mexico Northeast,
Michigan,
Mississippi,
Missouri,
Morocco,
Nansei-shoto,
Nebraska,
Nevada,
New Jersey,
New Mexico,
New York,
New Zealand North,
New Zealand South,
North Carolina,
Northern Provinces,
Ohio,
Oklahoma,
Ontario,
Oregon,
Pakistan,
Palestine,
Pennsylvania,
Poland,
Portugal,
Québec,
Rhode I.,
Romania,
Sardegna,
Sicilia,
South Carolina,
Spain,
Sudan,
Switzerland,
Tadzhikistan,
Tennessee,
Texas,
Transcaucasus,
Tunisia,
Turkey,
Turkey-in-Europe,
Turkmenistan,
Ukraine,
Uruguay,
Utah,
Uzbekistan,
Vermont,
Virginia,
Washington,
West Virginia,
Wisconsin,
Yugoslavia