This name is a synonym of Phlox longifolia subsp. longipes (M.E. Jones) Wherry.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50122817) with original publication details: Contr. W. Bot. 12: 53 1908.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:193546-2.
This name was in version 1 of The Plant List, record tro-50122817.