The record derives from TICA
(data supplied on )
which reports it as a synonym (record
ADDDC7AF-6C0B-40F5-A80D-D7E12F698B01) with original publication details: Fl. Brit. Ind. (J. D. Hooker). 3(8): 406. 1881 406 1881.
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 tatarica in version 1 of The Plant List.