This name is a synonym of Sedum radiatum subsp. ciliosum (Howell) R.T. Clausen.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 8901430) with original publication details: Fl. N.W. Amer. 2: 214 1898.
This name was in version 1 of The Plant List, record tro-8901430.