The record derives from TICA
(data supplied on )
which reports it as a synonym (record
1754D59E-8E6D-4D42-AC13-E69803348EA4) with original publication details: Contr. Gray Herb. 42: 462 (1913) 462 1913.
This name record (from TICA) was not included in version 1 of The Plant List. It is possible the same name was included from a different data source, to check this you can search for Ageratum conyzoides in version 1 of The Plant List.