This name is a synonym of Symphyotrichum parviceps (E.S.Burgess) G.L.Nesom.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 9248AB37-53A5-46C2-AD36-8097A3FABA34) with original publication details: Rhodora 10 94 1908.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:23305-2.
This name was in version 1 of The Plant List, record gcc-56707.