This name is a synonym of Symphyotrichum racemosum (Elliott) G.L.Nesom.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record DB317B8C-490A-46AD-8D20-A20B9532773C) with original publication details: Phytologia 55 378 1984.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:23459-2.
This name was in version 1 of The Plant List, record gcc-60881.