This name is a synonym of Symphyotrichum foliaceum var. parryi (D.C.Eaton) G.L.Nesom.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record D6191871-1826-4275-8207-D66C1D4616EE) with original publication details: Rhodora 17 15 1915.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:23450-2.
This name was in version 1 of The Plant List, record gcc-67339, and has not been changed.