A.W. Kuchler was a really smart guy who studied plants and how they grow. He made a very helpful map of all the different types of plants that grow in different parts of the world. This map is called the "Potential Natural Vegetation" map, which means he figured out what plants would naturally grow in certain areas if there were no people around.
Basically, he looked at things like the climate (how hot or cold it is), the amount of rainfall, and the type of soil in an area to figure out what plants would like to grow there. He put all this information together to make his map, which helps scientists and people who work with plant life understand what kind of plants can grow in different areas of the world. This is important because it helps us take care of our environment and make sure we don't harm the natural balance of things.