Native to:
Assam,
Bangladesh,
China South-Central,
China Southeast,
East Himalaya,
Myanmar,
Nepal,
Thailand,
West Himalaya
Introduced into:
Alabama,
Albania,
Andaman Is.,
Arizona,
Arkansas,
Austria,
Bahamas,
Bolivia,
Caroline Is.,
Cayman Is.,
Colombia,
Costa Rica,
Cuba,
Czechoslovakia,
Denmark,
Dominican Republic,
Ecuador,
Florida,
Georgia,
Germany,
Great Britain,
Gulf of Guinea Is.,
Haiti,
Illinois,
India,
Jamaica,
Kansas,
Kazakhstan,
Kentucky,
Korea,
Laos,
Leeward Is.,
Louisiana,
Marianas,
Marshall Is.,
Massachusetts,
Michigan,
Mississippi,
Missouri,
New Caledonia,
New York,
Nicaragua,
Nicobar Is.,
North Carolina,
North Caucasus,
Ohio,
Oman,
Ontario,
Pakistan,
Pennsylvania,
Pitcairn Is.,
Puerto Rico,
South Carolina,
Sri Lanka,
Sweden,
Tadzhikistan,
Trinidad-Tobago,
Turkmenistan,
Utah,
Uzbekistan,
Venezuela,
Vietnam,
Virginia,
Windward Is.,
Zaïre