This name is a synonym of Aster asteroides subsp. costei (H.Lév.) Grierson.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record EC3A1EA5-237E-4DCB-9633-D7E8590C7795).
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 likiangensis in version 1 of The Plant List.