Cypripedium parviflorum I believe.
Do a google on cultivating C. parviflorum and mix up a soil recipe you find that's consistently recommended by several sites. Likely you will need some specific ingredients such as pine needles (collect them yourself and bake them at 200*F for an hour or so let cool in the oven), oak leaf mold (buy or collect yourself), sphagnum moss, etc.
One year I grew a Queen ladyslipper rootstock or C. reginae - the MN state flower (got from a licensed nursery), it grew and bloomed the year of planting but didn't come back the following year. I had it in a 1/2 whiskey barrel planter with asiatic lillies and some other small woodland plants. The barrel may have froze too hard - though the lillies came back every year for 1/2 a decade now. If yours is in the ground it may be more sheltered from extreme temps.