This name is a synonym of Delphinium gracilentum Greene.
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a synonym with original publication details: Bull. Torrey Bot. Club 69: 147 1942.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:77468-2.
This name was in version 1 of The Plant List, record kew-2760207, and has not been changed.