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 F0CB5530-29AA-4E02-A74F-FE12A84031BF) with original publication details: 245 1836.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:298906-2.
This name was in version 1 of The Plant List, record gcc-72455.