This name is a synonym of Symphyotrichum ericoides var. pansum (S.F.Blake) G.L.Nesom.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 9B7CB5B0-EE26-47CB-80A7-A3668457D2B2) with original publication details: Rhodora 80 335 1978.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:23388-2.
This name was in version 1 of The Plant List, record gcc-61046, and has not been changed.