This name is a synonym of Symphyotrichum spathulatum (Lindl.) G.L.Nesom.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 7335A0A3-11CA-4C6C-ADE5-0A2CBAB0F0F1) with original publication details: 1047 1925.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:23031-2.
This name was in version 1 of The Plant List, record gcc-5461.