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 D49D897D-06DB-431F-8A61-7C5AFD7F2C57) with original publication details: Rhodora 35 24 1933.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:310871-2.
This name was in version 1 of The Plant List, record gcc-56177.