Native to:
Alaska,
Alberta,
Altay,
Amur,
Arizona,
Austria,
Baltic States,
Belarus,
Belgium,
British Columbia,
Bulgaria,
Buryatiya,
Central European Rus,
China North-Central,
China South-Central,
Chita,
Colorado,
Connecticut,
Czechoslovakia,
Denmark,
East European Russia,
Finland,
France,
Germany,
Great Britain,
Greenland,
Hungary,
Iceland,
Idaho,
Inner Mongolia,
Irkutsk,
Italy,
Japan,
Kamchatka,
Kazakhstan,
Kentucky,
Khabarovsk,
Korea,
Krasnoyarsk,
Kuril Is.,
Labrador,
Magadan,
Maine,
Manchuria,
Manitoba,
Maryland,
Massachusetts,
Michigan,
Minnesota,
Mongolia,
Montana,
Netherlands,
New Brunswick,
New Hampshire,
New Jersey,
New Mexico,
New York,
Newfoundland,
North Carolina,
North European Russi,
Northwest European R,
Northwest Territorie,
Norway,
Nova Scotia,
Nunavut,
Ontario,
Oregon,
Pennsylvania,
Poland,
Primorye,
Prince Edward I.,
Québec,
Rhode I.,
Romania,
Sakhalin,
Saskatchewan,
South Dakota,
Spain,
Sweden,
Switzerland,
Taiwan,
Tennessee,
Turkey,
Tuva,
Ukraine,
Utah,
Vermont,
Virginia,
Washington,
West Siberia,
West Virginia,
Wisconsin,
Wyoming,
Yakutskiya,
Yugoslavia,
Yukon