The record derives from TICA
(data supplied on )
which reports it as a synonym (record
458DEA1D-1A09-401C-B536-86D2E37C2741) with original publication details: "G.C. Clementi in Mem. Reale Accad. Sci. Torino, ser. 2 16. 1857" 285 1857.
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 Cichorium byzantinum in version 1 of The Plant List.