This name is a synonym of Sedum versadense C.H. Thompson.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 8902557) with original publication details: Cact. Succ. J. (Los Angeles) 19: 51, f. 34 1947.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:231673-2.
This name was in version 1 of The Plant List, record tro-8902557, and has not been changed.