The record derives from TICA
(data supplied on )
which reports it as a synonym (record
DDE35A88-3444-477A-959C-EFD9F865CACD) with original publication details: "L.C. Treviranus, Ind. Sem. Hort. Vratisl. 2. 1820" 3 1820.
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 parviflorus in version 1 of The Plant List.