This name is a synonym of Erigeron muirii A.Gray.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 00D59F62-CDDF-41AF-B207-464DD6898217) with original publication details: 19 1932.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:23785-2.
This name was in version 1 of The Plant List, record gcc-37903.