This name is a synonym of Symphyotrichum potosinum (A.Gray) G.L.Nesom.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 088B5DB5-36E2-4BB4-83A2-3D86EC4DF1BC) with original publication details: Syn. Fl. N. Amer. 1(2) 199 1884.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:23664-2.
This name was in version 1 of The Plant List, record gcc-33166.