This name is a synonym of Begonia involucrata Liebm..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 370261) with original publication details: Abh. Königl. Akad. Wiss. Berlin 1855: 205 1855.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:106164-1.
This name was in version 1 of The Plant List, record kew-370261.