What are the adaptations of the water moss fern, water lettuce and water hyacinth?
* Floating leaves are generally tough because they have to withstand the weather and water movement. * The green pigment-containing chloroplasts important for photosynthesis are restricted to the upper surface of the leaves which are the only surface to be well lit. * Stomata (breathing pores), through which gas exchange takes place in the leaf, are also found only on the upper surface of the leaf. * This upper surface often has a thick waxy cuticle to repel water and help to keep the stomata open and clear. * Air-filled internal cavities are also often present. http://www.countrysideinfo.co.
