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 D45D8A8B-6DC9-4B1C-B7CD-577FBF394765) with original publication details: 69 1832.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:181585-1.
This name was in version 1 of The Plant List, record gcc-47242.