This name is a synonym of Tragopogon dubius Scop..
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 4EB0490C-EB82-4A54-9A02-BE990E2B6E9F) with original publication details: Flore de France 10: 5 1908.
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 major in version 1 of The Plant List.