Cypripedium genus --- orchid family

clustered lady's slipper (Cypripedium fasciculatum) -- in July -- Rocky Mountain National Park, CO     green & brown     

mountain lady's slipper (Cypripedium montanum) -- in June --  Glacier National Park, MT           white & cream ​      

yellow lady's slipper (Cypripedium parviflorum) -- in June -- Stove Prairie, Roosevelt NF, Larimer County Foothills        yellow & orange