morphological character
It is best to have big, clean and green leaves. The floating lotus leaf stems in the early stage of lotus growth are green, covered with small thorns, like umbrella handles; If you break the stem of the lotus leaf, there will be many connected filaments on the stem. Numerous micron-sized waxy papillae structures are attached to the surface of lotus leaves. When observing these papillae with electron microscope, we can see that many nanoparticles with similar structures are attached to the surface of each micron-sized papillae, which scientists call the micro-nano dual structure of lotus leaf. It is these tiny double structures that make the contact area between the lotus leaf surface and water droplets or dust very limited, so there is a phenomenon that water droplets roll on the leaf surface and take away dust. Water will not stay on the surface of lotus leaves.