This name is a synonym of Rhododendron ponticum subsp. baeticum (Boiss. & Reut.) Hand.-Mazz..
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a synonym with original publication details: Diagn. Pl. Orient. II, 3: 118 1856.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:331994-1.
This name was in version 1 of The Plant List, record kew-2418829.