This name is a synonym of Lepidium ecklonii Schrad..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 100360263) with original publication details: Fl. Cap. 1: 30. 1860.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:286214-1.
This name was in version 1 of The Plant List, record tro-100360263, and has not been changed.