The record derives from TICA
(data supplied on )
which reports it as a synonym (record
1D607B51-F5D5-4052-BFB4-DCCB596282DE) with original publication details: "G.W.T.G. Bischoff, Beitr. Fl. Deutschl.. 1851" 99 1851.
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 Tragopogon tommasinii in version 1 of The Plant List.