Nuphar ulvacea is a species of rhizomatous aquatic plant native to the US-American states Alabama and Florida.

The glabrous, terete, smooth petiole is 45-70 cm long, and 7 mm wide.

[3] The flowers, supported by long peduncles, extend above the water surface.

[2] The type specimen was collected by A. H. Curtiss in a blackwater River near Milton, Florida, USA on the 14th of May 1898.

[6] It occurs in blackwater habitats, streams fed by springs,[5][6][3] and old, water-filled sand and gravel pits.