Native to:
Afghanistan,
Alabama,
Albania,
Alberta,
Altay,
Amur,
Arizona,
Arkansas,
Assam,
Austria,
Baltic States,
Bangladesh,
Belarus,
British Columbia,
Bulgaria,
Buryatiya,
California,
Central European Russia,
China North-Central,
China South-Central,
China Southeast,
Chita,
Colorado,
Connecticut,
Corse,
Czechoslovakia,
Delaware,
District of Columbia,
East Aegean Is.,
East European Russia,
East Himalaya,
Florida,
France,
Georgia,
Germany,
Greece,
Hungary,
Idaho,
Illinois,
India,
Indiana,
Inner Mongolia,
Iowa,
Iran,
Irkutsk,
Italy,
Japan,
Kamchatka,
Kansas,
Kazakhstan,
Kentucky,
Khabarovsk,
Korea,
Krasnoyarsk,
Krym,
Kuril Is.,
Laos,
Lebanon-Syria,
Louisiana,
Maine,
Manchuria,
Manitoba,
Maryland,
Massachusetts,
Mexico Northwest,
Michigan,
Minnesota,
Mississippi,
Missouri,
Mongolia,
Montana,
Myanmar,
Nansei-shoto,
Nebraska,
Nepal,
Nevada,
New Brunswick,
New Hampshire,
New Jersey,
New Mexico,
New York,
North Carolina,
North Caucasus,
North Dakota,
Nova Scotia,
Ohio,
Oklahoma,
Ontario,
Oregon,
Pakistan,
Palestine,
Pennsylvania,
Philippines,
Poland,
Portugal,
Primorye,
Qinghai,
Québec,
Rhode I.,
Romania,
Sakhalin,
Saskatchewan,
South Carolina,
South Dakota,
South European Russia,
Spain,
Switzerland,
Taiwan,
Tennessee,
Texas,
Thailand,
Tibet,
Transcaucasus,
Turkey,
Turkey-in-Europe,
Tuva,
Ukraine,
Vermont,
Vietnam,
Virginia,
Washington,
West Himalaya,
West Siberia,
West Virginia,
Wisconsin,
Wyoming,
Xinjiang,
Yakutskiya,
Yugoslavia
Introduced into:
Algeria,
Argentina Northeast,
Belgium,
Bermuda,
Brazil South,
Brazil Southeast,
Canary Is.,
Cape Provinces,
Costa Rica,
Denmark,
Finland,
Great Britain,
Ireland,
Kenya,
KwaZulu-Natal,
Madeira,
Mexico Central,
Mexico Southeast,
Mexico Southwest,
Netherlands,
New South Wales,
New Zealand North,
Nicaragua,
Norfolk Is.,
Northern Provinces,
Norway,
Ogasawara-shoto,
Sardegna,
Sicilia,
Sweden,
Tanzania,
Tunisia,
Utah,
Victoria,
Zaïre,
Zimbabwe