This name is a synonym of Antirrhinum molle subsp. lopesianum (Rothm.) P.Silva.
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a synonym with original publication details: Feddes Repert. Spec. Nov. Regni Veg. Beih. 136: 65 1956.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:799174-1.
This name was in version 1 of The Plant List, record kew-2642718.