This name is a synonym of Begonia grandis Dryand..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym and as an illegitimate name (record 361165) with original publication details: Fl. Pleine Terre ed. 3: 155 1870.
This name was in version 1 of The Plant List, record kew-361165.