The image shows a close-up of a group of yellow lichen growing on a rock surface. The lichen is elongated and has a rough texture, with small bumps and ridges on its surface. It appears to be growing in a cluster, with some overlapping each other. The rock surface is covered in small patches of gray and white lichen, and there are a few small rocks scattered around the lichen. The overall color of the image is a warm, earthy tone.