This name is a synonym of Symphyotrichum praealtum (Poir.) G.L.Nesom.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record A0745F84-D60B-4CF8-8B30-BF44F3F6B815) with original publication details: Phytologia 55 383 1984.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:23956-2.
This name was in version 1 of The Plant List, record gcc-64534.