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 55AD8E3B-DD0D-4847-89AE-36584DC61BED) with original publication details: Amer. Midl. Naturalist 29 461 1943.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:293013-2.
This name was in version 1 of The Plant List, record gcc-29404, and has not been changed.