This name is a synonym of Symphyotrichum defoliatum (Parish) G.L.Nesom.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record CF54F4DA-D4C2-420C-9236-0A767EEDCF95) with original publication details: 1046 1925.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:23748-2.
This name was in version 1 of The Plant List, record gcc-5605, and has not been changed.