This name is a synonym of Symphyotrichum concolor (L.) G.L.Nesom.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record B699212F-3F87-4297-BF71-8544A7744A10) with original publication details: Rhodora 38 448 1936.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:23244-2.
This name was in version 1 of The Plant List, record gcc-90968.