Native to:
China South-Central,
Tibet
Introduced into:
Alabama,
Alaska,
Albania,
Alberta,
Altay,
Amur,
Arizona,
Assam,
Austria,
Bahamas,
Baleares,
Baltic States,
Bangladesh,
Belarus,
Belgium,
Bermuda,
Bolivia,
Botswana,
Bulgaria,
Buryatiya,
California,
Cape Provinces,
Central European Russia,
China North-Central,
China Southeast,
Chita,
Colorado,
Connecticut,
Corse,
Costa Rica,
Czechoslovakia,
Delaware,
Denmark,
District of Columbia,
East European Russia,
East Himalaya,
Ethiopia,
Finland,
Florida,
France,
Free State,
Georgia,
Germany,
Great Britain,
Hungary,
Iceland,
Idaho,
Illinois,
Indiana,
Inner Mongolia,
Iowa,
Iraq,
Ireland,
Irkutsk,
Italy,
Jamaica,
Japan,
Kamchatka,
Kansas,
Kazakhstan,
Kentucky,
Kenya,
Khabarovsk,
Korea,
Krasnoyarsk,
Krym,
KwaZulu-Natal,
Louisiana,
Magadan,
Maine,
Manchuria,
Manitoba,
Maryland,
Massachusetts,
Michigan,
Minnesota,
Missouri,
Mongolia,
Montana,
Mozambique,
Nebraska,
Nepal,
Netherlands,
New Hampshire,
New Jersey,
New Mexico,
New York,
New Zealand North,
New Zealand South,
Newfoundland,
North Carolina,
North Caucasus,
North Dakota,
Northern Provinces,
Northwest European Russia,
Norway,
Nova Scotia,
Ohio,
Oklahoma,
Ontario,
Oregon,
Pakistan,
Pennsylvania,
Poland,
Portugal,
Primorye,
Prince Edward I.,
Québec,
Rhode I.,
Romania,
Sakhalin,
Sardegna,
Saskatchewan,
Sicilia,
South Carolina,
South Dakota,
South European Russia,
Spain,
Sweden,
Switzerland,
Tanzania,
Tennessee,
Texas,
Transcaucasus,
Turkey,
Tuva,
Uganda,
Ukraine,
Uzbekistan,
Vermont,
Vietnam,
Virginia,
Washington,
West Himalaya,
West Siberia,
West Virginia,
Wisconsin,
Wyoming,
Yakutskiya,
Yugoslavia,
Yukon,
Zambia,
Zaïre,
Zimbabwe