This name is a synonym of Erigeron elmeri (Greene) Greene.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record A406E2FA-560B-42F5-B8D9-678F62B7A9B0) with original publication details: 1056 1925.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:93613-2.
This name was in version 1 of The Plant List, record gcc-53619, and has not been changed.