This name is a synonym of Symphyotrichum depauperatum (Fernald) G.L.Nesom.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 1E5B68E2-E056-4699-B0DF-74CC0EDC4B90) with original publication details: Rhodora 10 94 1908.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:23304-2.
This name was in version 1 of The Plant List, record gcc-83667.