This name is a synonym of Erigeron thunbergii var. heterotrichus (Hara) Hara.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym and as an invalid name (record 22D56024-D147-4E09-86A4-65EEECC23983) with original publication details: 827 1935.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:181407-1.
This name was in version 1 of The Plant List, record gcc-77031, and has not been changed.