This name is a synonym of Sedum oregonense (S. Watson) M. Peck.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 8902039) with original publication details: Proc. Biol. Soc. Wash. 40(27): 119 1927.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:231918-2.
This name was in version 1 of The Plant List, record tro-8902039, and has not been changed.