Ilex opaca, commonly known as the American holly, is a species of evergreen tree native to the eastern United States. It typically grows to a height of 15 to 30 feet and features glossy, dark green leaves with spiny edges. The tree produces bright red berries that are a food source for various birds and wildlife. This species thrives in a range of soil types and prefers well-drained, acidic conditions. Ilex opaca is often used in landscaping for its attractive foliage and berries, especially during the winter months, making it a popular choice for holiday decorations.