This name is a synonym of Erigeron gilliesii (Hook. & Arn.) Cabrera.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record BCDF6C4A-BB86-48D7-B90E-DD1C6BC58E37) with original publication details: Companion Bot. Mag. 2 49 1836.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:23483-2.
This name was in version 1 of The Plant List, record gcc-129811.