Native to:
Connecticut,
Labrador,
Maine,
Maryland,
Massachusetts,
New Brunswick,
New Hampshire,
New Jersey,
New York,
Newfoundland,
North Carolina,
Nova Scotia,
Pennsylvania,
Prince Edward I.,
Québec,
Rhode I.,
South Carolina,
Vermont,
Virginia,
West Virginia
Introduced into:
Austria,
Baltic States,
Belarus,
Belgium,
Bulgaria,
Central European Russia,
Cuba,
Czechoslovakia,
Denmark,
Dominican Republic,
East Aegean Is.,
Fiji,
France,
Germany,
Great Britain,
Greece,
Hungary,
Iraq,
Ireland,
Italy,
Jawa,
Khabarovsk,
Korea,
Krym,
Kuril Is.,
Marianas,
Netherlands,
New South Wales,
North Caucasus,
Norway,
Poland,
Primorye,
Romania,
Sakhalin,
South European Russia,
Spain,
Sweden,
Switzerland,
Tasmania,
Transcaucasus,
Turkmenistan,
Ukraine,
Yugoslavia