This name is a synonym of Erigeron acris subsp. droebachiensis (O.F.Müll.) Arcang..
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 677E8860-25D7-4BAE-9238-C08B6DB3B880) with original publication details: 57 1853.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:204117-1.
This name was in version 1 of The Plant List, record gcc-117386, and has not been changed.