Why do lotus leaves repel water?
Lotus is an aquatic plant whose microscopic surface structure and waxy coating strongly repel water droplets.
Structure, development and life cycle
Microscopic bumps reduce the contact area between water and leaf, while wax chemistry prevents spreading. Rolling droplets collect loose dust, creating the self-cleaning lotus effect. Leaves rise above water unlike those of many water-lilies. A large seed receptacle and notably long-lived seeds are other distinctive traits.
Growing, uses and cautions
Rhizomes spread through bottom soil in sunny warm still water, and winter depth matters in cold regions. Vigorous growth can fill small ponds and may be contained in sturdy pots. Edible rhizomes and seeds should come only from correctly identified food crops in clean water. Ornamental pond treatments may make plants unsuitable for eating.