I used to have this one. Over a decade ago a neighbor wanted a start of mine, so I used a flat edged shovel, dug into the ground and divided it in half to give her a 'start'. It turned out that the half I gave her had the root ball and the half I was left with, didn't grow after that. I wondered why it didn't grow, so I dug it up, brushed the soil away and realized that there weren't any roots attached. I mentioned it to her, but she didn't offer to give me the half I gave her. When I gave the 'start' to her, I hadn't realized that the rootball was all in one clump, because of soil, etc.... covering the roots. So I was left without nothing.
I never got around to replacing it, but someday I will.