Native to:
Alaska,
Albania,
Alberta,
Aleutian Is.,
Arizona,
Austria,
Azores,
Baltic States,
Belarus,
Belgium,
British Columbia,
Bulgaria,
California,
Central European Rus,
Colorado,
Connecticut,
Corse,
Czechoslovakia,
Delaware,
Denmark,
District of Columbia,
East European Russia,
East Himalaya,
Finland,
France,
Føroyar,
Germany,
Great Britain,
Greece,
Guatemala,
Haiti,
Hawaii,
Hungary,
Iceland,
Idaho,
Illinois,
Indiana,
Iowa,
Iran,
Ireland,
Italy,
Japan,
Korea,
Kriti,
Kuril Is.,
Labrador,
Lebanon-Syria,
Maine,
Manchuria,
Maryland,
Massachusetts,
Mexico Central,
Mexico Southeast,
Michigan,
Minnesota,
Missouri,
Montana,
Morocco,
Netherlands,
Nevada,
New Brunswick,
New Guinea,
New Hampshire,
New Jersey,
New Mexico,
New South Wales,
New York,
New Zealand North,
Newfoundland,
North Carolina,
North Caucasus,
North Dakota,
North European Russi,
Northwest European R,
Northwest Territorie,
Norway,
Nova Scotia,
Nunavut,
Ohio,
Ontario,
Oregon,
Palestine,
Pennsylvania,
Poland,
Portugal,
Prince Edward I.,
Québec,
Rhode I.,
Romania,
Saskatchewan,
Sicilia,
South European Russi,
Spain,
Sumatera,
Sweden,
Switzerland,
Tennessee,
Transcaucasus,
Turkey,
Ukraine,
Utah,
Vermont,
Victoria,
Virginia,
Washington,
West Virginia,
Wisconsin,
Wyoming,
Yugoslavia,
Yukon