This name is a synonym of Delphinium cardinale Hook..
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a synonym with original publication details: Proc. Calif. Acad. Sci. 2: 22 1863.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:710611-1.
This name was in version 1 of The Plant List, record kew-2759782, and has not been changed.