This succulent, evergreen perennial has tightly packed rosettes of leaves.  Gray-green leaves are tipped reddish-brown and are bristle pointed.  This is a full sun perennial that is easy to grow and very adaptable.

The arachnoideum varieties are often referred to as Hens & Chicks because of the mother plants that give rise to smaller offsets.

Tectorum varieties are similar in their production of rosettes, but look a little less like mother and child plants.  They are commonly referred to as Houseleeks.

Varieties:

Arachnoideum Braunii - green-red leaves, summer bloom, 3-4” tall

Arachnoideum Cobweb - pale green-silver leaves, rose red summer bloom, 3-4” tall

Tectorum Hens & Chicks -green leaves with violet tips, summer bloom, 4” tall

Tectorum Purple Beauty -greenish red leaves with purple tips, purple-pink flower spikes bloom in summer, 4” tall

Tectorum Red Beauty - gray-green leaves with red tips, summer bloom, 3-4” tall

Tectorum Sanford - deep red color, summer bloom, 4” tall

Tectorum Siverine - silver-gray leaves, summer bloom, 4” tall

Photos from top to bottom:
arachnoideum plant, arachnoideum flower, tectorum plant.