This name is a synonym of Delphinium nuttallianum Pritz. ex Walp..
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a synonym with original publication details: Univ. Colorado Stud., Ser. D, Phys. Sci. 2: 130 1945.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:77429-2.
This name was in version 1 of The Plant List, record kew-2760109.