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: Repert. Spec. Nov. Regni Veg. Beih. 30(1): 473 1925.
This name was in version 1 of The Plant List, record kew-2871291, and has not been changed.