This name is a synonym of Begonia fischeri Schrank.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym and as an illegitimate name (record 362570) with original publication details: Suppl. Hort. Bot. Hafn. 108 1819.
This name was in version 1 of The Plant List, record kew-362570.