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 97653111-CC9F-4DCC-BB73-BE32AC5F1219) with original publication details: 90 1841.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:99443-2.
This name was in version 1 of The Plant List, record gcc-64391.