This name is a synonym of Phlox maculata subsp. pyramidalis (Sm.) Wherry.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 100376563) with original publication details: Exot. Bot. 2: 55, t. 87 1805.
This name record (from Tropicos) was not included in version 1 of The Plant List. It is possible the same name was included from a different data source, to check this you can search for Phlox pyramidata in version 1 of The Plant List.