This name is a synonym of Pilosella vansoestii (de Retz) Mateo.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record CCA8421D-AFF3-428A-AC21-D2B8D97CDB85) with original publication details: 309 1974.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:877448-1.
This name was in version 1 of The Plant List, record gcc-66916, and has not been changed.