This name is a synonym of Phlox bifida subsp. stellaria (A. Gray) Wherry.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50205112) with original publication details: Bartonia 11: 34 1929.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:193378-2.
This name was in version 1 of The Plant List, record tro-50205112.