This name is a synonym of Tragopogon porrifolius subsp. cupani (Guss. ex DC.) I.Richardson.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 1FB70C87-EB77-4AA7-A266-88E0A70DF3FC) with original publication details: 113 1838.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:255983-1.
This name was in version 1 of The Plant List, record gcc-92565, and has not been changed.