This name is a synonym of Symphyotrichum ontarionis var. glabratum (Semple) Brouillet & D.Bouchard.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 175B95B4-86C3-4CB5-B6B8-A73C758104F2) with original publication details: Univ. Waterloo Biol. Ser. 38 60 1996.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:307162-2.
This name was in version 1 of The Plant List, record gcc-61504.