This name is a synonym of Lactuca muralis (L.) Gaertn..
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 56D0C8BE-6EBE-47B9-9547-026F3E64F41D) with original publication details: 331 1811.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:192889-1.
This name was in version 1 of The Plant List, record gcc-1342.