pond lily
/ˈpɒnd ˌlɪli/Chiefly US
noun
Any of several chiefly yellow North American water lilies, especially the spatterdock, Nuphar advena.
Origin
Mid 18th century; earliest use found in Jared Eliot (1685–1763), Congregationalist minister in America, physician, and writer on agriculture. From pond + lily, after water lily.