Native to:
Alabama,
Alaska,
Alberta,
Altay,
Amur,
Arkansas,
Assam,
Austria,
Baltic States,
Belarus,
Belgium,
British Columbia,
Buryatiya,
Central European Russia,
China North-Central,
China South-Central,
China Southeast,
Chita,
Colorado,
Connecticut,
Czechoslovakia,
Delaware,
Denmark,
District of Columbia,
East European Russia,
East Himalaya,
Finland,
Florida,
France,
Georgia,
Germany,
Guatemala,
Hungary,
Illinois,
India,
Indiana,
Inner Mongolia,
Iowa,
Iran,
Irkutsk,
Italy,
Japan,
Kamchatka,
Kansas,
Kazakhstan,
Kentucky,
Khabarovsk,
Kirgizstan,
Korea,
Krasnoyarsk,
Kuril Is.,
Labrador,
Louisiana,
Magadan,
Maine,
Manchuria,
Manitoba,
Maryland,
Massachusetts,
Mexico Central,
Mexico Gulf,
Mexico Northeast,
Mexico Southeast,
Mexico Southwest,
Michigan,
Minnesota,
Mississippi,
Missouri,
Mongolia,
Nebraska,
Nepal,
Netherlands,
New Brunswick,
New Hampshire,
New Jersey,
New York,
Newfoundland,
North Carolina,
North Caucasus,
North Dakota,
North European Russia,
Northwest European Russia,
Northwest Territories,
Norway,
Nova Scotia,
Ohio,
Oklahoma,
Ontario,
Pennsylvania,
Poland,
Primorye,
Prince Edward I.,
Québec,
Rhode I.,
Romania,
Sakhalin,
Saskatchewan,
South Carolina,
South Dakota,
Sweden,
Switzerland,
Taiwan,
Tennessee,
Texas,
Tibet,
Transcaucasus,
Turkey,
Tuva,
Ukraine,
Vermont,
Virginia,
West Himalaya,
West Siberia,
West Virginia,
Wisconsin,
Wyoming,
Xinjiang,
Yakutskiya,
Yugoslavia,
Yukon
Introduced into:
Great Britain,
Ireland