This name is a synonym of Rostraria festucoides (Link) Romero Zarco.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 397665) with original publication details: Fl. Sicul. Prodr. Suppl.: 29 1832.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:391564-1.
This name was in version 1 of The Plant List, record kew-397665.