Linda, I wondered why you weren't around. I am so glad to see you back posting. So sorry to hear about the gall bladder surgery. My DH had that several years ago. It took him quite a long time to get over the fatigue. Just don't push yourself, give your self time to heal completely.
Sea Urchin is Sedum lineare. The lineare part of the name is the specie of sedum.
Stonecrop (Sedum lineare 'Sea Urchin')