Native to:
Alabama,
Alaska,
Albania,
Alberta,
Algeria,
Altay,
Amur,
Arizona,
Arkansas,
Austria,
Belarus,
Belgium,
British Columbia,
Bulgaria,
Buryatiya,
California,
Central European Russia,
China North-Central,
China South-Central,
Chita,
Colorado,
Connecticut,
Corse,
Czechoslovakia,
Denmark,
District of Columbia,
East European Russia,
East Himalaya,
Finland,
Florida,
France,
Føroyar,
Germany,
Great Britain,
Greece,
Hungary,
Iceland,
Idaho,
Illinois,
Indiana,
Iowa,
Iran,
Iraq,
Ireland,
Irkutsk,
Italy,
Japan,
Kamchatka,
Kentucky,
Khabarovsk,
Korea,
Krasnoyarsk,
Krym,
Kuril Is.,
Labrador,
Lebanon-Syria,
Libya,
Louisiana,
Magadan,
Maine,
Manchuria,
Manitoba,
Maryland,
Massachusetts,
Michigan,
Minnesota,
Mississippi,
Montana,
Nansei-shoto,
Netherlands,
Nevada,
New Brunswick,
New Hampshire,
New Jersey,
New York,
Newfoundland,
North Carolina,
North Caucasus,
North Dakota,
North European Russia,
Northwest European Russia,
Northwest Territories,
Norway,
Nova Scotia,
Nunavut,
Ohio,
Oklahoma,
Ontario,
Oregon,
Palestine,
Pennsylvania,
Poland,
Primorye,
Prince Edward I.,
Québec,
Rhode I.,
Romania,
Sakhalin,
Sardegna,
Saskatchewan,
South Carolina,
South European Russia,
Spain,
Sweden,
Switzerland,
Tadzhikistan,
Tennessee,
Texas,
Transcaucasus,
Turkey,
Turkey-in-Europe,
Tuva,
Ukraine,
Vermont,
Virginia,
Washington,
West Siberia,
Wisconsin,
Wyoming,
Yakutskiya,
Yugoslavia,
Yukon