This name is a synonym of Echinocereus triglochidiatus var. mojavensis (Engelm. & J.M.Bigelow) L.D.Benson.
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a synonym with original publication details: Bibl. Index N. Amer. Bot. 398 1878.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:130450-1.
This name was in version 1 of The Plant List, record kew-2712106, and has not been changed.