Native to:
Afghanistan,
Alabama,
Alaska,
Albania,
Alberta,
Altay,
Arkansas,
Assam,
Austria,
Baltic States,
Bangladesh,
Belarus,
Belgium,
Borneo,
British Columbia,
Bulgaria,
Buryatiya,
Cameroon,
Central European Russia,
China North-Central,
China South-Central,
China Southeast,
Colorado,
Connecticut,
Corse,
Czechoslovakia,
Delaware,
Denmark,
District of Columbia,
East European Russia,
East Himalaya,
Fiji,
Finland,
Florida,
France,
Føroyar,
Georgia,
Germany,
Ghana,
Great Britain,
Greece,
Greenland,
Gulf of Guinea Is.,
Hawaii,
Hungary,
Iceland,
Idaho,
Illinois,
India,
Indiana,
Iowa,
Ireland,
Irkutsk,
Italy,
Ivory Coast,
Japan,
Jawa,
Kamchatka,
Kansas,
Kazakhstan,
Kentucky,
Kenya,
Khabarovsk,
Korea,
Krasnoyarsk,
Kuril Is.,
Labrador,
Lesser Sunda Is.,
Liberia,
Louisiana,
Madagascar,
Magadan,
Maine,
Malaya,
Maluku,
Manchuria,
Manitoba,
Maryland,
Massachusetts,
Mauritius,
Michigan,
Minnesota,
Mississippi,
Missouri,
Mongolia,
Montana,
Myanmar,
Nansei-shoto,
Nepal,
Netherlands,
New Brunswick,
New Guinea,
New Hampshire,
New Jersey,
New York,
Newfoundland,
Nigeria,
North Carolina,
North Caucasus,
North European Russia,
Northwest European Russia,
Northwest Territories,
Norway,
Nova Scotia,
Nunavut,
Ohio,
Oklahoma,
Ontario,
Oregon,
Pakistan,
Pennsylvania,
Philippines,
Poland,
Primorye,
Prince Edward I.,
Québec,
Rhode I.,
Romania,
Réunion,
Sakhalin,
Samoa,
Saskatchewan,
Seychelles,
South Carolina,
Spain,
Sri Lanka,
St.Helena,
Sulawesi,
Sumatera,
Sweden,
Switzerland,
Taiwan,
Tanzania,
Tennessee,
Texas,
Thailand,
Tibet,
Transcaucasus,
Turkey,
Tuva,
Uganda,
Ukraine,
Vanuatu,
Vermont,
Vietnam,
Virginia,
Washington,
West Himalaya,
West Siberia,
West Virginia,
Wisconsin,
Yakutskiya,
Yugoslavia,
Yukon