This name is a synonym of Begonia guaduensis Kunth.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 360944) with original publication details: Trans. & Proc. Bot. Soc. Edinburgh 22: 433 1905.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:30377-2.
This name was in version 1 of The Plant List, record kew-360944.