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 1E8DA55E-E4EE-47F3-B8AD-5039B997C950) with original publication details: W. Amer. Sci. 6 10 1889.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:23617-2.
This name was in version 1 of The Plant List, record gcc-43297.