Good eyes Marilyn, it is an Aeonium, several branches that I lopped off a mother plant to start another "stand" of them.
Julia, the flat rocks were lying around the back when I purchased the house and I strategically placed them so that I could step from rock to rock to weed, clean leaf debris and prune plants without having to, especially now, put my feet into the soil. I just hope my agility holds up from here on out.