I think I have a Leopard's Bane, the plant I bought about 3-4 years ago. It got all crazy (runners) spreading everywhere, so I started to dig it out with medium success, as I must do it every spring. I am now trying to take the 'baby's' and plant them somewhere else, but I want to reidentify to make sure that is what I have. The problem is the leaves are a purple/burgundy color right now, and although it hasn't flowered in a couple of years due to me digging them out, I am sure they were yellow daisy like. But, nothing I came across on the internet says anything about purple foliage. It may be only for new growth (one plant is about 12" tall). I don't see any buds forming yet. Is there such thing as a purple leaf Leopard's Bane?