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 1A5C336F-B3B6-4927-BE3B-8EEABCFA9A06) with original publication details: 2051 1803.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:181251-1.
This name was in version 1 of The Plant List, record gcc-95269.