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 E928A5A9-9159-49B8-8BAD-333BD107BE3C) with original publication details: Prodr. (DC.) 5: 235 235 1836.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:23226-2.
This name was in version 1 of The Plant List, record gcc-27716.