Native to:
Alabama,
Albania,
Arkansas,
Austria,
Baltic States,
Belarus,
Bulgaria,
Central European Rus,
China North-Central,
China South-Central,
China Southeast,
Connecticut,
Corse,
Czechoslovakia,
Delaware,
Denmark,
District of Columbia,
Finland,
Florida,
France,
Georgia,
Germany,
Greece,
Hungary,
Illinois,
Indiana,
Iowa,
Italy,
Japan,
Kazakhstan,
Kentucky,
Kirgizstan,
Korea,
Maine,
Manchuria,
Manitoba,
Maryland,
Massachusetts,
Michigan,
Minnesota,
Mississippi,
Missouri,
New Brunswick,
New Hampshire,
New Jersey,
New York,
North Carolina,
North European Russi,
Northwest European R,
Norway,
Nova Scotia,
Ohio,
Ontario,
Pakistan,
Pennsylvania,
Poland,
Primorye,
Québec,
Rhode I.,
Romania,
South Carolina,
Spain,
Sweden,
Switzerland,
Tadzhikistan,
Tennessee,
Ukraine,
Vermont,
Virginia,
West Himalaya,
West Siberia,
West Virginia,
Wisconsin,
Yugoslavia
Introduced into:
Belgium,
Great Britain