Native to:
Alaska,
Alberta,
Austria,
Azores,
Baltic States,
Belarus,
Belgium,
British Columbia,
Bulgaria,
Buryatiya,
California,
China Southeast,
Connecticut,
Czechoslovakia,
Denmark,
Finland,
France,
Germany,
Great Britain,
Hungary,
Idaho,
Illinois,
Indiana,
Iowa,
Ireland,
Italy,
Japan,
Kentucky,
Labrador,
Maine,
Manitoba,
Maryland,
Massachusetts,
Michigan,
Minnesota,
Montana,
Netherlands,
New Brunswick,
New Hampshire,
New Jersey,
New York,
Newfoundland,
North Carolina,
Northwest European R,
Norway,
Nova Scotia,
Ohio,
Ontario,
Oregon,
Pennsylvania,
Poland,
Portugal,
Prince Edward I.,
Québec,
Rhode I.,
Romania,
Saskatchewan,
Spain,
Sweden,
Switzerland,
Turkey,
Ukraine,
Vermont,
Virginia,
Washington,
West Siberia,
West Virginia,
Wisconsin,
Yugoslavia