This name is a synonym of Symphyotrichum simmondsii (Small) G.L.Nesom.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record C7294A83-A82C-403A-8CD2-C0186EACCE0A) with original publication details: 1913.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:182309-1.
This name was in version 1 of The Plant List, record gcc-117199, and has not been changed.