This name is a synonym of Tragopogon porrifolius subsp. longirostris (Sch.Bip.) Greuter.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 6993F2FF-EAD2-4EBC-88E9-DC38FAAC67F7).
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 longirostris in version 1 of The Plant List.