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 A7D04D89-CBFD-489E-8FD9-FACE7A8F82F8) with original publication details: Phytologia 63(2): 131 1987.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:272822-2.
This name was in version 1 of The Plant List, record gcc-72037.