This name is a synonym of Stellaria longipes subsp. arenicola (Raup) C.C. Chinnappa & J.K. Morton.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50121009) with original publication details: Naturaliste Canad. 93(5): 646 1966.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:244226-2.
This name was in version 1 of The Plant List, record tro-50121009, and has not been changed.