This name is a synonym of Dianthus collinus subsp. glabriusculus (Kit.) Thaisz.
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a synonym with original publication details: Linnaea 32: 528 1863.
This name was in version 1 of The Plant List, record kew-2764080, and has not been changed.