This name is a synonym of Symphyotrichum pilosum var. pringlei (A.Gray) G.L.Nesom.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 5B0DCE26-A436-4298-B3D2-4B91374D1EF2) with original publication details: Rhodora 32 140 1930.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:23938-2.
This name was in version 1 of The Plant List, record gcc-40773.