This name is a synonym of Sedum chauveaudii var. margaritae (Raym.-Hamet) Fröd..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50198501) with original publication details: Repert. Spec. Nov. Regni Veg. 8: 142 1910.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:275674-1.
This name was in version 1 of The Plant List, record tro-50198501, and has not been changed.