Some common trees found in St. Louis include:

1. **Oak Trees**: Several species of oak trees are found in St. Louis, including white oak (Quercus alba), red oak (Quercus rubra), and bur oak (Quercus macrocarpa). Oaks are known for their strength, longevity, and distinctive lobed leaves.

2. **Maple Trees**: Maple trees are prevalent in St. Louis and include species such as sugar maple (Acer saccharum) and red maple (Acer rubrum). These trees are valued for their vibrant fall foliage and shade-providing canopy.

3. **Sycamore Trees**: Sycamore trees (Platanus occidentalis) are commonly found along rivers and streams in St. Louis. They are known for their distinctive mottled bark and large, palmate leaves.

4. **Tulip Trees**: Tulip trees (Liriodendron tulipifera), also known as yellow poplars, are tall, stately trees with large, tulip-shaped flowers and distinctive, lobed leaves. They are native to the eastern United States, including Missouri.

5. **Hackberry Trees**: Hackberry trees (Celtis occidentalis) are hardy, adaptable trees that are well-suited to urban environments. They are known for their small, sweet berries and serrated leaves.

6. **Honey Locust Trees**: Honey locust trees (Gleditsia triacanthos) are fast-growing trees with delicate, fern-like foliage and long, twisting seed pods. They are often planted as ornamental trees in St. Louis.

7. **Dogwood Trees**: Several species of dogwood trees are found in St. Louis, including flowering dogwood (Cornus florida) and Kousa dogwood (Cornus kousa). These trees are prized for their showy spring blooms and colorful fall foliage.