Welcome. Should we call you PlantHoarder? You could put a name in your profile if you prefer that.
Those unknown varieties will remain forever unknown... sorry. We refer to them as NOIDs (No ID). There are just too many similar varieties and they grow so differently in varying habitats that identification is not possible. Most of us have several NOIDs that we obtained with labels but later found out are not the as advertised.
Northern California summers may be challenging for Sempervivums. Being in pots make sure you move them into afternoon shade during hot weather. And try not to let them get too soaked in the wet season.
