This name is a synonym of Xanthium strumarium L..
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 1008809C-D730-4931-A636-A4177FE522C4).
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 Xanthium californicum in version 1 of The Plant List.