This name is a synonym of Acilepis divergens (Roxb.) H.Rob. & Skvarla.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 92BA6E11-9522-4CA8-9B94-4915AE0B9BB5) with original publication details: Cat. 3171. 1831. 3171 1831.
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 Eupatorium polyanthemum in version 1 of The Plant List.