Native to:
Alabama,
Arizona,
California,
Colorado,
Georgia,
Kentucky,
Maryland,
Mexico Northeast,
Mexico Northwest,
Nevada,
New Mexico,
North Carolina,
Pennsylvania,
South Carolina,
Tennessee,
Texas,
Utah,
Virginia,
West Virginia,
Wyoming
Introduced into:
Albania,
Algeria,
Argentina Northeast,
Arkansas,
Austria,
Azores,
Baltic States,
Belarus,
Belgium,
British Columbia,
Bulgaria,
Canary Is.,
Cape Provinces,
Central European Russia,
Chile Central,
China North-Central,
China South-Central,
China Southeast,
Connecticut,
Corse,
Czechoslovakia,
Delaware,
District of Columbia,
East Aegean Is.,
East European Russia,
Easter Is.,
Florida,
France,
Free State,
Germany,
Great Britain,
Greece,
Hungary,
Idaho,
Illinois,
India,
Indiana,
Inner Mongolia,
Iowa,
Iraq,
Ireland,
Italy,
Japan,
Kansas,
Kazakhstan,
Khabarovsk,
Kirgizstan,
Korea,
Kriti,
Krym,
Kuril Is.,
KwaZulu-Natal,
Lebanon-Syria,
Lesotho,
Libya,
Louisiana,
Madeira,
Maine,
Manchuria,
Massachusetts,
Michigan,
Minnesota,
Mississippi,
Missouri,
Montana,
Morocco,
Nebraska,
Netherlands,
New Brunswick,
New Hampshire,
New Jersey,
New York,
New Zealand North,
New Zealand South,
North Caucasus,
North Dakota,
Northern Provinces,
Nova Scotia,
Ohio,
Oklahoma,
Ontario,
Oregon,
Pakistan,
Palestine,
Poland,
Primorye,
Prince Edward I.,
Qinghai,
Québec,
Rhode I.,
Romania,
Réunion,
Sakhalin,
Sardegna,
Sicilia,
South Dakota,
South European Russia,
Spain,
Switzerland,
Tadzhikistan,
Taiwan,
Transcaucasus,
Turkey,
Turkey-in-Europe,
Turkmenistan,
Ukraine,
Uzbekistan,
Vermont,
Washington,
West Himalaya,
Wisconsin,
Xinjiang,
Yugoslavia