This name is a synonym of Sempervivum rhenanum (Hegi & Schmid) Law..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 8903693) with original publication details: Ill. Fl. Mitt.-Eur. 2: 549 1922.
This name was in version 1 of The Plant List, record tro-8903693, and has not been changed.