This name is a synonym of Cylindropuntia echinocarpa (Engelm. & J.M.Bigelow) F.M.Knuth.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 5101122) with original publication details: Cacti Arizona (ed. 3) 19, 32, f. 1.3 1969.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:175689-2.
This name was in version 1 of The Plant List, record tro-5101122, and has not been changed.