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 6300804) with original publication details: J. Arnold Arbor. 17(4): 248–249, pl. 196 1936.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:159062-1.
This name was in version 1 of The Plant List, record tro-6300804, and has not been changed.