This name is a synonym of Symphyotrichum defoliatum (Parish) G.L.Nesom.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 83EAA264-2C36-43E8-969B-D0A1239D6862) with original publication details: Prodr. 5: 243 (1836) 243 1836.
This name was in version 1 of The Plant List, record gcc-124411, and has not been changed.