Native to:
Alaska,
Alberta,
Austria,
Baltic States,
Belgium,
British Columbia,
California,
Central European Russia,
Colorado,
Connecticut,
Corse,
Delaware,
Denmark,
East Himalaya,
Finland,
France,
Germany,
Greece,
Greenland,
Iceland,
Idaho,
Illinois,
Indiana,
Iowa,
Italy,
Maine,
Maryland,
Massachusetts,
Michigan,
Minnesota,
Mississippi,
Montana,
Nepal,
Nevada,
New Brunswick,
New Hampshire,
New Jersey,
New York,
Newfoundland,
North Carolina,
North Dakota,
North European Russia,
Northwest Territories,
Norway,
Nova Scotia,
Ohio,
Ontario,
Oregon,
Pennsylvania,
Prince Edward I.,
Québec,
Rhode I.,
Saskatchewan,
South Dakota,
Sweden,
Switzerland,
Tibet,
Utah,
Vermont,
Virginia,
Washington,
West Virginia,
Wisconsin,
Wyoming,
Yugoslavia
Extinct in:
Czechoslovakia,
Poland