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 E51693A0-4481-4EFD-A7A3-B383D651FE03) with original publication details: 2049 1803.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:182285-1.
This name was in version 1 of The Plant List, record gcc-111617.