This name is a synonym of Symphyotrichum falcatum var. commutatum (Torr. & A.Gray) G.L.Nesom.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record A03F2CAF-5E32-47B1-B16A-3CD5B5B07FBB) with original publication details: Univ. Waterloo Biol. Ser. 41 134 2002.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:20011408-1.
This name was in version 1 of The Plant List, record gcc-32796.