Grass include some of the most versatile plant life-forms in the world. Grasses have adapted to different climates like rainforest, intertidal habitats, and even hot and dry deserts. Grass is one of the most wide-spread plant types around the world. Grass is also a very important food and energy source for animals. The epidermis is most clearly visible in the top right area in the photo. In this area you can see the different sections of the gel-like solutions that make up the stroma. The palisade cells are most clearly visible on the middle section of the picture. Water bubbles may look like empty palisade cells so it is important to look closely to see the cells.