About Nuphar advena (Aiton) Aiton
Nuphar advena (Aiton) Aiton is a perennial aquatic herb with spongy rhizomes that measure 5–10 centimetres (2–4 in) wide. Its leaves are mostly emergent, but may also grow floating or fully submerged. Submerged leaves range from 12–40 cm (4+1⁄2–15+1⁄2 in) in length and 7–30 cm (3–12 in) in width.
The flowers of Nuphar advena are protogynous, fragrant, nectariferous, solitary, and yellow-green, reaching up to 4 cm wide. Flowers float on the water surface or extend above it; each flower has six sepals, and the gynoecium is made up of 9–23 carpels. The fruit is fleshy, ribbed, green, shaped ovoid to broadly obovate, and measures 2–5 cm long and wide. Each fruit holds 186–353 seeds, which are 3–6 mm long.
Nuphar advena is native to Canada (including Nova Scotia), the United States, Mexico, and Cuba, and has been introduced to the United Kingdom. It grows in ponds, lakes, streams, rivers, marshes, and swamps.
Ecologically, its flowers are pollinated by sweat bees, syrphid flies, and leaf beetles. Turtles and waterfowl eat its seeds, and muskrats sometimes collect its rootstocks.
This plant is used as food: dried seeds can be eaten whole or ground into flour. Native Americans cooked its rootstocks, removed the rind, and prepared the resulting sweetish, glutinous contents in various ways. It is also cultivated as an ornamental plant.
