This name is a synonym of Plagiobothrys pygmaeus (Kunth) I.M. Johnst..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 4001183) with original publication details: Chlor. Andina 2: 88 1859.
This name was in version 1 of The Plant List, record tro-4001183, and has not been changed.