Native to:
China North-Central,
China South-Central
Introduced into:
Afghanistan,
Alabama,
Albania,
Algeria,
Argentina Northeast,
Argentina Northwest,
Arkansas,
Assam,
Austria,
Bangladesh,
Bulgaria,
Buryatiya,
Cambodia,
Cameroon,
Canary Is.,
Cape Provinces,
Central African Republic,
Central European Russia,
Chagos Archipelago,
China Southeast,
Colombia,
Colorado,
Connecticut,
Costa Rica,
Cyprus,
Czechoslovakia,
Delaware,
Denmark,
District of Columbia,
East Aegean Is.,
Ecuador,
Florida,
Free State,
Gambia,
Georgia,
Germany,
Greece,
Hainan,
Hawaii,
Honduras,
Hungary,
Illinois,
India,
Indiana,
Inner Mongolia,
Iowa,
Iran,
Iraq,
Italy,
Japan,
Kansas,
Kazakhstan,
Kentucky,
Kirgizstan,
Korea,
Kriti,
Krym,
KwaZulu-Natal,
Laos,
Lebanon-Syria,
Lesotho,
Libya,
Louisiana,
Maine,
Manchuria,
Maryland,
Massachusetts,
Mexico Northeast,
Mexico Northwest,
Mexico Southwest,
Michigan,
Minnesota,
Mississippi,
Missouri,
Morocco,
Nebraska,
New Hampshire,
New Jersey,
New Mexico,
New York,
Norfolk Is.,
North Carolina,
North Dakota,
Northern Provinces,
Ohio,
Oklahoma,
Oman,
Ontario,
Pakistan,
Palestine,
Paraguay,
Pennsylvania,
Peru,
Poland,
Primorye,
Qinghai,
Rhode I.,
Romania,
South Carolina,
South Dakota,
South European Russia,
Spain,
Sudan,
Swaziland,
Sweden,
Tadzhikistan,
Taiwan,
Tennessee,
Texas,
Tibet,
Tonga,
Tunisia,
Turkey,
Turkey-in-Europe,
Turkmenistan,
Ukraine,
Uruguay,
Uzbekistan,
Venezuela,
Vermont,
Vietnam,
Virginia,
West Himalaya,
West Virginia,
Wisconsin,
Xinjiang