Native to:
Afghanistan,
Alabama,
Alaska,
Aleutian Is.,
Altay,
Arizona,
Austria,
Baltic States,
Belarus,
British Columbia,
Buryatiya,
California,
Central European Rus,
China North-Central,
China South-Central,
China Southeast,
Chita,
Colorado,
Connecticut,
Czechoslovakia,
East European Russia,
East Himalaya,
Illinois,
Indiana,
Inner Mongolia,
Iowa,
Irkutsk,
Japan,
Kamchatka,
Kazakhstan,
Khabarovsk,
Kirgizstan,
Korea,
Krasnoyarsk,
Kuril Is.,
Labrador,
Louisiana,
Maine,
Manchuria,
Massachusetts,
Mexico Northeast,
Mexico Northwest,
Mexico Southwest,
Michigan,
Minnesota,
Missouri,
Mongolia,
Montana,
Nebraska,
Nepal,
New Brunswick,
New Hampshire,
New Jersey,
New Mexico,
New York,
Newfoundland,
North Carolina,
North European Russi,
Northwest European R,
Northwest Territorie,
Norway,
Nova Scotia,
Ohio,
Ontario,
Oregon,
Pakistan,
Pennsylvania,
Poland,
Primorye,
Prince Edward I.,
Québec,
Rhode I.,
Romania,
Sakhalin,
South European Russi,
Tadzhikistan,
Taiwan,
Tibet,
Tuva,
Ukraine,
Utah,
Uzbekistan,
Vermont,
Virginia,
Washington,
West Himalaya,
West Siberia,
Wisconsin,
Wyoming,
Xinjiang,
Yakutskiya,
Yukon
Introduced into:
Vietnam