This name is a synonym of Acanthocalycium spiniflorum (K.Schum.) Backeb..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50196907) with original publication details: Lobivia 85: 157 1985-1986.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:961924-1.
This name was in version 1 of The Plant List, record tro-50196907, and has not been changed.