This name is a synonym of Lepidium montanum Nutt..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50097474) with original publication details: Madroño 3(7): 307–308, f. 1 [map] 1936.
This name was in version 1 of The Plant List, record tro-50097474.