This name is a synonym of Lepidium tiehmii (Rollins) Al-Shehbaz.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 4103044) with original publication details: Syst. Bot. 7(2): 215–220, f. 1 1982.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:246142-2.
This name was in version 1 of The Plant List, record tro-4103044, and has not been changed.