This name is a synonym of Begonia cinnabarina Hook..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 359841) with original publication details: Gard. Mag. Bot. 2: 153 1850.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:106262-1.
This name was in version 1 of The Plant List, record kew-359841, and has not been changed.