Subspecies, varieties, forms and cultivars of plants belonging to the Sempervivum arachnoideum group

• Sempervivum arachnoideum L.: has very tight, small rosettes. The tips of the leaves are connected together by a very fine webbing that looks just like cobwebs. Distribution: Mountain of Europe from the Pyrenees to the Carpathians
• Sempervivum arachnoideum f. cristatum hort.: (syn. fasciatum) a curiosity that is fasciated (crested). The fasciation is not very stable.
• Sempervivum arachnoideum var. glabrescens Willk.: Rosettes less than 1.5 cm across, flattish with only a small amount of cobweb. Flowers white and produced freely.
• Sempervivum arachnoideum subs. tomentosum (C.B.Lehm. & Schnittsp.) Schinz & Thell.: has rosettes to 4 cm across, large and flattish with a very dense cobweb and an undercolour of dark red in spring. Distribution: Eastern Pyrenees, Southern Alps, South Tyrol, Apennines and Corsica.