Native to:
Alaska,
Altay,
Austria,
Baltic States,
Belarus,
British Columbia,
Bulgaria,
Central European Rus,
China North-Central,
China South-Central,
China Southeast,
Connecticut,
Czechoslovakia,
East European Russia,
France,
Germany,
Hungary,
Idaho,
Inner Mongolia,
Iran,
Italy,
Japan,
Kamchatka,
Khabarovsk,
Korea,
Krasnoyarsk,
Kuril Is.,
Labrador,
Maine,
Manchuria,
Massachusetts,
Michigan,
Minnesota,
New Brunswick,
New Hampshire,
New York,
Newfoundland,
North Caucasus,
Northwest European R,
Norway,
Nova Scotia,
Ontario,
Pennsylvania,
Poland,
Primorye,
Prince Edward I.,
Québec,
Romania,
Sakhalin,
Spain,
Sweden,
Switzerland,
Tibet,
Transcaucasus,
Turkey,
Ukraine,
Vermont,
West Siberia,
Wisconsin,
Xinjiang,
Yugoslavia