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 A97860C0-ABA7-4B9E-AEAB-E5499C6A85C1) with original publication details: "Taxon 31, 2 : 359 (1982)" 359 1982.
This name record (from TICA) was not included in version 1 of The Plant List. It is possible the same name was included from a different data source, to check this you can search for Symphyotrichum laeve in version 1 of The Plant List.