This name is a synonym of Symphyotrichum laeve (L.) Á.Löve & D.Löve.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 4C3F1C46-0E21-4463-A462-4B571DC6F220) with original publication details: Syn. Aster. Herb. 23 1818.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:181313-1.
This name was in version 1 of The Plant List, record gcc-40648.