Native to:
Alaska,
Albania,
Alberta,
Altay,
Amur,
Arizona,
Austria,
Baltic States,
Belarus,
British Columbia,
Bulgaria,
Buryatiya,
California,
Central European Russia,
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 Russia,
Northwest European Russia,
Northwest Territories,
Norway,
Ohio,
Oregon,
Pennsylvania,
Poland,
Portugal,
Primorye,
Québec,
Rhode I.,
Romania,
Sakhalin,
South Carolina,
South European Russia,
Spain,
Switzerland,
Taiwan,
Tennessee,
Thailand,
Transcaucasus,
Turkey,
Tuva,
Ukraine,
Vermont,
Virginia,
Washington,
West Siberia,
West Virginia,
Wyoming,
Xinjiang,
Yakutskiya,
Yugoslavia,
Yukon