This name is in version 1.1 of The Plant List, record kew-2642726, with some changes.
Antirrhinum majus subsp. ambiguum (Lange) Malag.
The record derives from WCSP (in review) which reports it as a synonym with original publication details: Subesp. Variac. Geogr. 19 1973 .
Full publication details for this name can be found in IPNI: urn:lsid:ipni.org:names:891189-1.