This name is a synonym of Symphyotrichum novi-belgii (L.) G.L.Nesom.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record A10B9A68-FFCD-45A6-8988-A9FC5D41AFF0) with original publication details: 239 1836.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:23701-2.
This name was in version 1 of The Plant List, record gcc-61858.