This name is a synonym of Begonia arborescens Raddi.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym and as an invalid name (record 361434) with original publication details: Hort. Franç. II, 3: 147 1861.
This name was in version 1 of The Plant List, record kew-361434.