This name is a synonym of Sedum obtusatum A. Gray.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 8902023) with original publication details: J. Bot. 57: 51 1919.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:231870-2.
This name was in version 1 of The Plant List, record tro-8902023.