This name is a synonym of Rhododendron × puniceum Planch..
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a synonym with original publication details: Ann. Inst. Roy. Hort. Fromont 1: 104 1829.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:326914-1.
This name was in version 1 of The Plant List, record kew-2667226.