This name is a synonym of Symphyotrichum falcatum (Lindl. ex Lindl.) G.L.Nesom.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 1A055677-3BCB-4559-AFB5-43EE042DE729) with original publication details: Canad. Field-Naturalist 64 43 1950.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:23362-2.
This name was in version 1 of The Plant List, record gcc-36642.