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 EFEE43E8-4780-44D5-B72E-396519479938) with original publication details: Phytologia 55(6): 380 1984.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:23339-2.
This name was in version 1 of The Plant List, record gcc-30995.