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 50205109) with original publication details: Proc. Amer. Acad. Arts 8: 252 1870.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:689853-1.
This name was in version 1 of The Plant List, record tro-50205109.