This name is a synonym of Symphyotrichum shortii (Lindl.) G.L.Nesom.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record A0EFD237-AA80-41F1-AC61-3A70294817BA) with original publication details: Rhodora 31 150 1929.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:24103-2.
This name was in version 1 of The Plant List, record gcc-74284.