This name is a synonym of Ageratina deltoidea (Jacq.) R.M.King & H.Rob..
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 1C47A649-DF42-4DA3-BEE8-7E243C4F9DF6) with original publication details: 63 1798.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:205785-1.
This name was in version 1 of The Plant List, record gcc-87842.