This name is a synonym of Erigeron trilobus (Decne.) Boiss..
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 09873CDB-D015-4849-9235-8F01E3B328F9) with original publication details: 440 1836.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:185728-1.
This name was in version 1 of The Plant List, record gcc-95309.