Water lilies

 

Water lilies  

Nymphaeaceae is a family of flowing planta, commonly called water lilies. They live as rhizomatous aquatic herbs in temperate and tropical climate around the word. The family contains five genera with about 70 known species. Water lilies are rooted in soil in bodies of water with leaves and flowers floating on or emergent from the surface. Leaves are around with radial notch in  Nymphaeaceae and Nuphar , but fully circular in Victoria and Euryale. It is the national flower of Bangaladesh.

Water lilies are a well studied clade of plants because their large flowers with multiple unspecialized parts were initially considered to represent the floral pattern of the earliest flowering  plants and later genetic studies confirmed their evolutionary position as basal angiosperms. Analyses of floral morphology and molecular characteristics and comparisons . 

Water lilies do not have surface leaves during winter and therefore the gases in the rhizome lacunae access equilibrium with  the gases of the sediment  water. The leftover of internal pressure constant streams of bubbles that outbreak when rising leaves are ruptured in the spring.