This name is a synonym of Symphyotrichum drummondii var. texanum (E.S.Burgess) G.L.Nesom.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 582C7DE2-5C14-44C9-B71A-3A198C5FFB23) with original publication details: Phytologia 55(6): 381 1984.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:23337-2.
This name was in version 1 of The Plant List, record gcc-31369.