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 0D4FF228-8CB7-4F01-AB52-8291CC2C3DCD) with original publication details: Rhodora 45 347 1943.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:24048-2.
This name was in version 1 of The Plant List, record gcc-89800.