This name is a synonym of Symphyotrichum drummondii (Lindl.) G.L.Nesom.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record CECB781C-51C4-4E62-B010-DF3DC9641996) with original publication details: 97 1835.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:308886-2.
This name was in version 1 of The Plant List, record gcc-130733.