Native to:
Afghanistan,
Alabama,
Alaska,
Albania,
Alberta,
Algeria,
Argentina Northeast,
Argentina Northwest,
Arizona,
Arkansas,
Assam,
Austria,
Baleares,
Baltic States,
Belarus,
Belgium,
Bolivia,
British Columbia,
Bulgaria,
California,
Canary Is.,
Central European Russia,
China North-Central,
China South-Central,
China Southeast,
Colorado,
Connecticut,
Corse,
Cyprus,
Czechoslovakia,
Delaware,
Denmark,
District of Columbia,
East Aegean Is.,
East European Russia,
East Himalaya,
El Salvador,
Eritrea,
Ethiopia,
Finland,
France,
Føroyar,
Georgia,
Germany,
Great Britain,
Greece,
Greenland,
Guatemala,
Gulf States,
Hungary,
Iceland,
Idaho,
Illinois,
India,
Indiana,
Inner Mongolia,
Iowa,
Iran,
Iraq,
Ireland,
Italy,
Japan,
Kansas,
Kazakhstan,
Kentucky,
Kenya,
Kirgizstan,
Korea,
Kriti,
Krym,
Labrador,
Lebanon-Syria,
Libya,
Louisiana,
Madeira,
Maine,
Manchuria,
Maryland,
Massachusetts,
Mexico Central,
Mexico Gulf,
Mexico Northeast,
Mexico Northwest,
Mexico Southeast,
Mexico Southwest,
Michigan,
Mississippi,
Missouri,
Montana,
Morocco,
Myanmar,
Nansei-shoto,
Nebraska,
Nepal,
Netherlands,
Nevada,
New Jersey,
New Mexico,
New York,
North Carolina,
North Caucasus,
North European Russia,
Northwest European Russia,
Norway,
Ogasawara-shoto,
Ohio,
Oklahoma,
Oman,
Ontario,
Oregon,
Pakistan,
Palestine,
Pennsylvania,
Peru,
Philippines,
Poland,
Portugal,
Qinghai,
Québec,
Rhode I.,
Romania,
Rwanda,
Sardegna,
Saskatchewan,
Saudi Arabia,
Sicilia,
South Carolina,
South Dakota,
South European Russia,
Spain,
Sudan,
Sweden,
Switzerland,
Tadzhikistan,
Taiwan,
Tanzania,
Tennessee,
Texas,
Thailand,
Tibet,
Transcaucasus,
Tunisia,
Turkey,
Turkey-in-Europe,
Turkmenistan,
Uganda,
Ukraine,
Utah,
Uzbekistan,
Vermont,
Vietnam,
Virginia,
Washington,
West Himalaya,
West Virginia,
Wyoming,
Yemen,
Yugoslavia,
Yukon,
Zaïre
Introduced into:
Argentina South,
Brazil South,
Chile Central,
Chile South,
Colombia,
Costa Rica,
Cuba,
Dominican Republic,
Falkland Is.,
Florida,
Manitoba,
Minnesota,
New Brunswick,
New Hampshire,
New Zealand South,
Newfoundland,
Nova Scotia,
Primorye,
Prince Edward I.,
Tasmania,
Venezuela,
West Siberia,
Wisconsin