This name is a synonym of Eryngium leavenworthii Torr. & A.Gray.
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a synonym with original publication details: Trans. Kansas Acad. Sci. 60: 162 1957.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:96373-2.
This name was in version 1 of The Plant List, record kew-2799391, and has not been changed.