This name is a synonym of Rorippa cryptantha (A.Rich.) Robyns & Boutique.
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a synonym with original publication details: Kunene-Sambesi Exped. 238 1903.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:287493-1.
This name was in version 1 of The Plant List, record kew-2380965, and has not been changed.