This name is a synonym of Xanthium strumarium subsp. brasilicum (Vell.) O.Bolòs & Vigo.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 1310C695-096C-44CB-B7F7-C8AB20741435) with original publication details: 1827.
This name was in version 1 of The Plant List, record gcc-120939, and has not been changed.