This name is a synonym of Symphyotrichum firmum (Nees) G.L.Nesom.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 711B9229-B896-4136-9B49-6B63A432B1D2) with original publication details: 25 1818.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:23430-2.
This name was in version 1 of The Plant List, record gcc-79405.