This name is a synonym of Lepidium eastwoodiae Wooton.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50124580) with original publication details: Cruciferae Continental N. Amer. 546 1993.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:1081064-2.
This name was in version 1 of The Plant List, record tro-50124580, and has not been changed.