This name is a synonym of Ageratina havanensis (Kunth) R.M.King & H.Rob..
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 8A833FD8-94B9-472B-9547-ED1A1FA99D4D) with original publication details: Linnaea 6 403 1831.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:206555-1.
This name was in version 1 of The Plant List, record gcc-136818.