This name is a synonym of Cerastium gracile Dufour.
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a synonym with original publication details: in Fl. Nar. Republ. Bulgariya 3: 387 1966.
This name was in version 1 of The Plant List, record kew-2710386, and has not been changed.