Came across this post while googling around and I had to join to post a similar image I took the other day (hopefully that's OK and I'm not hijacking or something!?). It made me think of a dragonplant...
I'm new to the whole gardening thing, so I'm not exactly sure what this is - I purchased 3 of them from a local nursery and threw away the tags before I realized the usefulness in writing down what kind of plant something is. Based on some googling, I think it's some kind of jovibarba roller.