This name is a synonym of Sedum acre subsp. majus (Mast.) R.T. Clausen.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 8902082) with original publication details: Gard. Chron. 10: 685 1878.
This name was in version 1 of The Plant List, record tro-8902082, and has not been changed.