This name is a synonym of Begonia manicata Brongn..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 362278) with original publication details: Begonian 55: 89 1988.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:273177-2.
This name was in version 1 of The Plant List, record kew-362278.