I call this cactus, Rose. I don't know if this is the correct name for this cactus, but that is the name I'm using since it looks like a rose. When I first planted this cactus four years ago, I had no idea how large or quickly it would grow. I only knew that it would survive the hot sun of summer that pelts the back yard deck.
Today, Rose has not only grown and survived the heat of the summer, but has also surprised me with surviving the wet winters and cold nights of this region.