This name is a synonym of Tragopogon pratensis subsp. leiocarpus (Trnka) Greuter.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 77CC64F6-FB33-45BA-BC69-E07C3DC33CB8) with original publication details: 107 1856.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:256017-1.
This name was in version 1 of The Plant List, record gcc-131255, and has not been changed.