Native to:
Afghanistan,
Alabama,
Albania,
Arkansas,
Assam,
Austria,
Bangladesh,
Bulgaria,
California,
China North-Central,
China South-Central,
China Southeast,
Colombia,
Czechoslovakia,
East Himalaya,
Ecuador,
Florida,
France,
Georgia,
Germany,
Greece,
Guatemala,
Hainan,
Hungary,
Illinois,
Italy,
Japan,
Kentucky,
Korea,
Laos,
Louisiana,
Manchuria,
Maryland,
Mexico Central,
Mexico Gulf,
Mexico Northeast,
Mexico Southeast,
Mexico Southwest,
Minnesota,
Mississippi,
Myanmar,
Nansei-shoto,
Nebraska,
Nepal,
New Jersey,
New York,
North Carolina,
North Caucasus,
Oklahoma,
Pakistan,
Pennsylvania,
Poland,
Romania,
South Carolina,
Switzerland,
Taiwan,
Tennessee,
Thailand,
Tibet,
Transcaucasus,
Turkey,
Ukraine,
Vermont,
Vietnam,
Virginia,
West Himalaya,
West Virginia,
Wisconsin,
Yugoslavia
Introduced into:
Belgium,
Great Britain,
Ireland