x comollii Rota, 1853
Parentage : Sempervivum tectorum x S. wulfenii.
Synonyms :
Sempervivum x huteri Kerner (s.a.) (nom illeg.)
Sempervivum albidum Schnittspahn & Lehmann (1855)
Sempervivum x widderi Lehmann & Schnittspahn (1860)
Sempervivum x calcaratum Baker (1874)
Distribution : Naturally occurring where the parents cohabit, possibly rather rare.