This name is a synonym of Phlox speciosa var. lanceolata (E.E. Nelson) M. Peck.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50122812) with original publication details: Revis. W. N. Amer. Phlox. 29–30 1899.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:293366-2.
This name was in version 1 of The Plant List, record tro-50122812.