This name is a synonym of Symphyotrichum subspicatum (Nees) G.L.Nesom.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record E04FF2AD-D422-4677-955A-F7017565C534) with original publication details: Phytologia 55 380 1984.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:23217-2.
This name was in version 1 of The Plant List, record gcc-71542.