) is an aquatic plant in the family Nymphaeaceae, native to Eurasia and North America. It is also known as spatterdock, cow lily, or yellow pond-lily. The genus Nuphar is closely related to genus Nymphaea, but differs in having large 4-6 bright yellow-colored sepals and small petals, whereas in Nymphaea, the sepals are much smaller than the petals.
Yellow waterlily is a vigorous, deciduous, perennial deep -water plant that grows in freshwater beds, with the roots fixed into the ground and its green and leathery leaves floating on the surface. The undersides of the leaves are glabrous. The small, sickly-smelling, bottle-shaped yellow flower blooms from May to September. The inflorescence is a terminal, solitary, hermaphrodite (having both male and female organs) flower, and is pollinated by flies and beetles. The stigma disc of the flowers is star-shaped. The fruit is held above above water level to maturity, unlike the fruit of genus Nymphaea, which sinks below the water level immediately after the flower closes. The edible seeds of Nuphar lutea can be eaten raw or cooked, roasted and ground into powder, or toasted like popcorn.
Yellow waterlily grows in rich soil and sunny locations. It grows best in still water of up to 60 cm deep, but can tolerate slow moving water.
Propagation is by seeds.
Yellow waterlily (Nuphar lutea)