Tall trees can be found in many different environments, and can range from birch trees with seven letters, walnuts with seven letters, and elms with four letters. These trees are often used for landscaping, providing shade, and as a source of timber. Birch trees are known for their white bark and delicate leaves, while walnuts are known for their dark brown shells and edible nuts. Elms are known for their tall, vase-shaped canopy and their ability to survive in harsh climates. All three of these tall trees are an important part of the natural environment.