This name is a synonym of Arenaria armerina subsp. caesia (Boiss.) C.Díaz, C.Morales & F.Valle.
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a synonym with original publication details: Rivasgodaya 6: 14 1991.
This name was in version 1 of The Plant List, record kew-2649162, and has not been changed.