This name is a synonym of Caulanthus crassicaulis (Torr.) S.Watson.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50128289) with original publication details: Exped. Great Salt Lake 383–384, pl. 1 1852.
This name was in version 1 of The Plant List, record tro-50128289, and has not been changed.