The water-lily.
1778. The lake is covered near the banks of the islands with the large pond-lily; the leaves of which lie on the surface of the water so thick, as to cover it entirely for many acres together.J. Carver, Travels in North-America, p. 167. (N.E.D.)
1809. They entered into a boat with a view to collect pond lillies.The Repertory, Boston, Aug. 1.