This name is a synonym of Symphyotrichum depauperatum (Fernald) G.L.Nesom.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 6BB63D1C-801E-43C8-91B9-68D06D6369EE).
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 Aster depauperatus in version 1 of The Plant List.