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.

Intermediate between the parents but many variations. Plants in cultivation with this name are normally simply big forms of S. tectorum or S. tectorum cultivars.