This name is a synonym of Alyssum bertolonii subsp. scutarium Nyár..
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. 27: 394 1930.
This name was in version 1 of The Plant List, record kew-2871216, and has not been changed.