This name is a synonym of Blossfeldia liliputana Werderm..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50320494) with original publication details: Bradleya 5: 93 1987.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:944026-1.
This name was in version 1 of The Plant List, record tro-50320494, and has not been changed.