This name is a synonym of Lactuca quercina L..
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 831F842F-FF2B-4EC7-BFF0-37391E1E1779).
This name record (from TICA) was not included in version 1 of The Plant List. It is possible the same name was included from a different data source, to check this you can search for Lactuca quercina in version 1 of The Plant List.