This name is a synonym of Xanthium orientale subsp. italicum (Moretti) Greuter.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 0FCEB021-CF5E-4654-B07E-9CF514EEFFFA) with original publication details: 271 1976.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:878546-1.
This name was in version 1 of The Plant List, record gcc-60262.