This name is a synonym of Arabis pubescens subsp. leucanthemifolia (Pau & Font Quer) Maire.
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a synonym with original publication details: Pl. Marocc. Nov. 3: 11 1930.
This name was in version 1 of The Plant List, record kew-2646088, and has not been changed.