This name is a synonym of Antirrhinum latifolium subsp. intermedium (Debeaux) Nyman.
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a synonym with original publication details: Bull. Soc. Bot. France 6: 407 1859.
This name was in version 1 of The Plant List, record kew-2642736.