Sempervivum aka Hens n Chicks' 

Varieties include: Carmen, Commander Hay, and Ruby Heart.

Hens and chicks (Sempervivum tectorum) are hardy in zones 3 to 8. Plant them in areas that receive full sun and have well-drained soils. These low growing perennials prefer it hot and dry. This makes them good choices for rock gardens, dry wall, and droughty locations.