This name is a synonym of Sedum griffithsii Rose.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50102478) with original publication details: J. Wash. Acad. Sci. 29(11): 479 1939.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:231922-2.
This name was in version 1 of The Plant List, record tro-50102478, and has not been changed.