Water Gardening: ID on hardy waterlily collected at 100 year old mansion, 1 by bwilliams

bwilliams wrote:
Well my aunt and uncle live in a large house called the Gamble Mansion built in 1923 here in KY. They have a bed and breakfast place there and every few years we have a large family reunion at their place. I have been to this place many times but had never really thought about the plants growing around the place till this last trip. In the back part of the property is a fairly large pond completely full of waterlilies. I am not sure if these are species or if they are some very old hybrids? The pond was made up of mostly white flowering lilies but a few bright pink forms were also in the pond. My girlfriend who loved that I was willing to get in the pond for them took photos of me collecting three forms the white light pink and darker pink lilies. I thought they may have been some older hybrids that have started to revert back or breed back to species. Does anyone have any idea what they maybe??