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 1EA57B55-FACB-464A-AD9E-348CACFF957C) with original publication details: 1782.
This name was in version 1 of The Plant List, record gcc-28443, and has not been changed.