Ash trees are deciduous trees belonging to the genus Fraxinus. They are known for their tall stature, typically reaching heights of 30 to 80 feet. Ash trees have compound leaves, which means each leaf is made up of several smaller leaflets. They produce small flowers in the spring, followed by clusters of winged seeds called samaras. These trees are commonly found in North America, Europe, and Asia, thriving in a variety of soil types. However, ash trees have faced significant threats from pests like the emerald ash borer, which has led to widespread decline in ash populations across many regions.