Native to:
Afghanistan,
Alabama,
Alaska,
Albania,
Alberta,
Algeria,
Altay,
Amur,
Arizona,
Arkansas,
Assam,
Austria,
Baltic States,
Bangladesh,
Belarus,
Belgium,
British Columbia,
Bulgaria,
Buryatiya,
California,
Central European Russia,
China North-Central,
China South-Central,
China Southeast,
Chita,
Colorado,
Corse,
Cyprus,
Czechoslovakia,
Delaware,
Denmark,
District of Columbia,
East Aegean Is.,
East European Russia,
East Himalaya,
Ethiopia,
Finland,
Florida,
France,
Georgia,
Germany,
Greece,
Hungary,
Idaho,
Illinois,
Indiana,
Inner Mongolia,
Iowa,
Iran,
Iraq,
Irkutsk,
Italy,
Japan,
Kamchatka,
Kansas,
Kazakhstan,
Kazan-retto,
Kentucky,
Kenya,
Khabarovsk,
Kirgizstan,
Korea,
Krasnoyarsk,
Kriti,
Krym,
Kuril Is.,
Laos,
Lebanon-Syria,
Louisiana,
Magadan,
Manchuria,
Manitoba,
Maryland,
Mexico Central,
Mexico Gulf,
Mexico Northeast,
Mexico Northwest,
Michigan,
Minnesota,
Mississippi,
Missouri,
Mongolia,
Montana,
Myanmar,
Nansei-shoto,
Nebraska,
Nepal,
Netherlands,
Nevada,
New Hampshire,
New Jersey,
New Mexico,
New York,
North Carolina,
North Caucasus,
North Dakota,
North European Russia,
Northwest European Russia,
Northwest Territories,
Norway,
Ogasawara-shoto,
Ohio,
Oklahoma,
Ontario,
Oregon,
Pakistan,
Pennsylvania,
Poland,
Portugal,
Primorye,
Qinghai,
Québec,
Romania,
Rwanda,
Sakhalin,
Sardegna,
Saskatchewan,
Sicilia,
South Carolina,
South Dakota,
South European Russia,
Spain,
Sudan,
Sweden,
Switzerland,
Tadzhikistan,
Taiwan,
Tanzania,
Tennessee,
Texas,
Thailand,
Tibet,
Transcaucasus,
Turkey,
Turkey-in-Europe,
Turkmenistan,
Tuva,
Uganda,
Ukraine,
Utah,
Uzbekistan,
Vermont,
Vietnam,
Virginia,
Washington,
West Himalaya,
West Siberia,
West Virginia,
Wisconsin,
Wyoming,
Xinjiang,
Yakutskiya,
Yugoslavia,
Yukon,
Zaïre
Introduced into:
Great Britain,
Ireland