This name is a synonym of Phlox gladiformis (M.E. Jones) E.E. Nelson.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 25800763) with original publication details: Proc. Calif. Acad. Sci., ser. 2, 5(18): 711 1895.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:193556-2.
This name was in version 1 of The Plant List, record tro-25800763, and has not been changed.