This name is a synonym of Sedum spathulifolium Hook..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 8901456) with original publication details: Madroño 7(6): 174 1944.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:231878-2.
This name was in version 1 of The Plant List, record tro-8901456.