This name is a synonym of Ageratum conyzoides (L.) L..
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym and as an illegitimate name (record 47EED8B6-E37B-40C3-A138-0E862D298FF4) with original publication details: 26 1858.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:175527-1.
This name was in version 1 of The Plant List, record gcc-7812.