Water lily (scientific name: water lily? Perennial aquatic herbs; Hypertrophy of rhizome. Petiole cylindrical, slender. The leaves are oval, floating on the water, with the whole margin, heart-shaped base, dark green surface and deep purple back. Leaf type 2: floating leaves are round or oval, with curved base, heart-shaped or arrow-shaped, often without water; Submerged leaves are thin and brittle. Flowers are solitary, floating or sticking out of the water; Four calyx, green; Petals are usually eight. The fruit is obovate, about 3 cm long. Flowers are large and beautiful, floating on or above the water surface, open during the day and closed at night; Sepals nearly free; Petals are white, blue, yellow or pink, with multiple rounds, and sometimes the inner round gradually becomes stamens; Connectors with or without appendages; Carpels are ring-shaped, attached to fleshy cup-shaped receptacle, semi-submerged in it, with the lower part healing with it, the upper part extending into a style, the stigma recessed into the stigma plate, and the ovule inverted perpendicular to the inner wall of the ovary. Berries are spongy, irregularly cracked and mature underwater; The seeds are hard, covered with colloid, with fleshy cup-shaped aril, small embryo, a small amount of endosperm and abundant exoendosperm.
Distributed from northeast to Yunnan and west to Xinjiang. North Korea, Japan, India, the Soviet Union and North America also have it. Born in still waters such as ponds and lakes. Many parks are cultivated as ornamental plants, and their roots are used for food or wine making, and they are also used as medicine to treat children's slow convulsions; Whole grass can be used as green manure.