This name is a synonym of Aethionema saxatile subsp. athoum (Griseb.) Hayek.
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a synonym with original publication details: Géogr. Bot. Emp. Ottom. 70 1892.
This name was in version 1 of The Plant List, record kew-2871292, and has not been changed.