This name is a synonym of Symphyotrichum subspicatum (Nees) G.L.Nesom.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 6A27A813-19D3-4D80-BA1C-F4BDE75F73DE) with original publication details: Bull. Torrey Bot. Club 37 1910.
This name was in version 1 of The Plant List, record gcc-140327.