Scientific name: Nymphaea nouchali I came home from Chandnaish. And leaving the speed, I went to the roof to see the flowers.Blue water lilies are an integral part of the nature of riverine Bangladesh. Its eye-catching blue color and well-arranged lettering are bound to impress anyone. So I decided to plant this flower in my roof garden.water lillies is our national flower. We Bengalis should plant more and more national flower trees of our own country.