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 A4938153-0D0D-4DFE-B0E7-3CF37ACCA00A) with original publication details: Bot. Gaz. 38: 461. 1904 461 1904.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:310311-2.
This name was in version 1 of The Plant List, record gcc-32861, and has not been changed.