This name is a synonym of Begonia angulata Vell..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 362825) with original publication details: London J. Bot. 4: 134 1845.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:105571-1.
This name was in version 1 of The Plant List, record kew-362825.