This name is a synonym of Antirrhinum majus subsp. tortuosum (Bosc ex Vent.) Rouy.
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a synonym with original publication details: Fl. Italia 2: 426 1902.
This name was in version 1 of The Plant List, record kew-2642733.