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 61515881-00B6-441A-84AD-B24B8C112F3D) with original publication details: Rhodora 72 39 1970.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:23245-2.
This name was in version 1 of The Plant List, record gcc-62870.