This name is a synonym of Arenaria pseudofrigida (Ostenf. & O.C.Dahl) Steffen.
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a synonym with original publication details: Naturaliste Canad. 94: 628 1967.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:18481-2.
This name was in version 1 of The Plant List, record kew-2649234, and has not been changed.