This name is a synonym of Rhododendron indicum (L.) Sweet.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50060808) with original publication details: Fl. Serres Jard. Eur. 9: 80 1853-1854.
This name was in version 1 of The Plant List, record tro-50060808.