Native to:
Alaska,
Albania,
Alberta,
Altay,
Amur,
Arizona,
Austria,
Baltic States,
Belarus,
British Columbia,
Bulgaria,
Buryatiya,
California,
Central European Rus,
China North-Central,
China South-Central,
China Southeast,
Chita,
Colorado,
Connecticut,
Czechoslovakia,
Delaware,
East European Russia,
Finland,
France,
Georgia,
Germany,
Greece,
Hungary,
Idaho,
Inner Mongolia,
Irkutsk,
Italy,
Japan,
Kamchatka,
Kazakhstan,
Khabarovsk,
Kirgizstan,
Korea,
Krasnoyarsk,
Kuril Is.,
Labrador,
Magadan,
Maine,
Manchuria,
Maryland,
Massachusetts,
Mexico Northeast,
Mexico Northwest,
Mongolia,
Montana,
Myanmar,
Nevada,
New Brunswick,
New Hampshire,
New Jersey,
New Mexico,
New York,
North Carolina,
North Caucasus,
North European Russi,
Northwest European R,
Northwest Territorie,
Norway,
Ohio,
Oregon,
Pennsylvania,
Poland,
Portugal,
Primorye,
Québec,
Rhode I.,
Romania,
Sakhalin,
South Carolina,
South European Russi,
Spain,
Switzerland,
Taiwan,
Tennessee,
Thailand,
Transcaucasus,
Turkey,
Tuva,
Ukraine,
Vermont,
Virginia,
Washington,
West Siberia,
West Virginia,
Wyoming,
Xinjiang,
Yakutskiya,
Yugoslavia,
Yukon