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: Spic. Fl. Rumel. 1: 281 1843.
This name was in version 1 of The Plant List, record kew-2871276, and has not been changed.