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 94ECD2FB-84B9-4123-81C3-CFE0C946029A) with original publication details: 105 1779.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:192945-1.
This name was in version 1 of The Plant List, record gcc-124081.