I live in Michigan and unfortunaely jioned the ranks of the unemployed this summer. I am working now. I used my time off to travel across the state to visit it's prime CP spots. Most are on stste land and some are owned by the nature conservancy. There is of course quite a bit on private land as well. I stoped by a DNR office in the UP to ask if they knew where I might see a P. vulgaris in the wild and they menioned that there were several sites with S. pupurpurea spp. purpurea f. heterophylla but these were all on private land. There is always the danger that the private sites will be developed but quite a few great spots have been preserved.