This name is a synonym of Lactuca lessertiana (Wall. ex DC.) Wall. ex C.B.Clarke.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 5E43E463-B233-4020-8609-09350FE96523) with original publication details: 102 1844.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:232168-1.
This name was in version 1 of The Plant List, record gcc-4933.