This name is a synonym of Cylindropuntia echinocarpa (Engelm. & J.M.Bigelow) F.M.Knuth.
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a synonym with original publication details: Pacif. Railr. Rep. Parke, Bot. 4(5): 49 1857.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:136553-1.
This name was in version 1 of The Plant List, record kew-2391954, and has not been changed.