⚠ Version 1 of The Plant List has been superseded.
This name is in version 1.1 of The Plant List, record kew-2706024, and has not been changed.
This name is a synonym of Caulanthus crassicaulis var. glaber .
The record derives from WCSP (in review) which reports it as a synonym with original publication details: Bot. Jahrb. Syst. 66: 97 1933.
Full publication details for this name can be found in IPNI: urn:lsid:ipni.org:names:280850-1
.