Native to:
Alaska,
Albania,
Alberta,
Algeria,
Altay,
Arizona,
Austria,
Baltic States,
Belarus,
Belgium,
British Columbia,
Bulgaria,
Buryatiya,
California,
Central European Russia,
Colorado,
Connecticut,
Corse,
Czechoslovakia,
Denmark,
District of Columbia,
East European Russia,
Finland,
France,
Germany,
Great Britain,
Greece,
Hungary,
Iceland,
Idaho,
Illinois,
Indiana,
Iowa,
Ireland,
Irkutsk,
Italy,
Kazakhstan,
Khabarovsk,
Krasnoyarsk,
Krym,
Kuril Is.,
Labrador,
Louisiana,
Maine,
Manitoba,
Maryland,
Massachusetts,
Michigan,
Minnesota,
Mongolia,
Montana,
Netherlands,
Nevada,
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,
Nunavut,
Ohio,
Ontario,
Oregon,
Pennsylvania,
Poland,
Portugal,
Primorye,
Prince Edward I.,
Québec,
Rhode I.,
Romania,
Sakhalin,
Saskatchewan,
South European Russia,
Spain,
Sweden,
Switzerland,
Tennessee,
Transcaucasus,
Turkey,
Turkey-in-Europe,
Tuva,
Ukraine,
Vermont,
Virginia,
Washington,
West Siberia,
West Virginia,
Wisconsin,
Wyoming,
Yakutskiya,
Yugoslavia,
Yukon
Introduced into:
Kamchatka,
Tasmania