This name is a synonym of Aster dumosus Hoffm..
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 27716B43-F1F3-4C2B-81BB-BB448B095FDB).
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 dumosus in version 1 of The Plant List.