The record derives from TICA
(data supplied on )
which reports it as a synonym (record
B8D175EB-F0E6-4242-8606-2D8183805646) with original publication details: Escr. D. A. Larranaga 1: 406. 1922. 406 1922.
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 humile in version 1 of The Plant List.