This name is a synonym of Erigeron eatonii A.Gray.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record A5B6419A-3990-4539-94C9-DB7DCE06B3F8).
This name record (from TICA) was not included in version 1 of The Plant List. It is possible the same name was included from a different data source, to check this you can search for Erigeron eatonii in version 1 of The Plant List.