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 E964DC5E-69C3-4AAD-BACE-5CB8A48340EB) with original publication details: Rhodora 35 26 1933.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:23957-2.
This name was in version 1 of The Plant List, record gcc-50006.