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 (record 78611B22-0AEE-426A-9A07-9215E70A2F49) with original publication details: Proc. Amer. Acad. Arts 49 466 1913.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:7128-2.
This name was in version 1 of The Plant List, record gcc-58867.