x nixonii Zonneveld, 1981
Parentage : Sempervivum globiferum x S. heuffelii
Synonyms :
Sempervivum x kwediana Mitchell (1982) (S. globiferum ssp. allionii x S. heuffelii)
Sempervivum x mitchellii Zonneveld (1982) (S. globiferum ssp. arenaria x S. heuffelii)
Sempervivum x smithii Mitchell (1987) (nom. illeg.)
Description :
Intermediate between the parents.
Rosettes 3 - 5 cm across.
Leaves abruptly mucronate, hairless except along the margins.
Offsets between the lower leaves on very short stolons.
Flowering stems ca 8 cm, cauline leaves lightly hairy.
Flowers : Petals fringed near the top, but not on keel.
The plants die after flowering and are completely sterile.