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 88BBBC1D-48FA-4296-B424-2F4601E54665) with original publication details: Univ. Calif. Publ. Bot. 3 82 1907.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:23297-2.
This name was in version 1 of The Plant List, record gcc-25594.