To determine if a tree is a black locust, there are several key characteristics to look for. Keep in mind that visual identification is often the most reliable method, but it is always best to consult with a local expert or arborist if you are unsure. Here are some signs to watch out for:
1. Leaf Characteristics:
Black locust trees have compound leaves, meaning each leaf is made up of multiple leaflets. Typically, there are 7 to 21 leaflets per leaf, each being oval or elliptical in shape. The leaflets are usually smooth-edged and arranged in an alternate pattern along the leaf stem. They have a shiny, dark green color on the upper surface and a paler green or bluish-green underside.
2. Flower Appearance:
Black locust trees produce showy, fragrant flowers that are white or cream-colored. These flowers are arranged in clusters called racemes, which can be up to 8 inches long. Each raceme contains numerous small, individual flowers. The blooms usually appear in late spring or early summer, creating a beautiful display.
3. Bark Texture and Color:
The bark of black locust trees is relatively smooth when young, but as the tree ages, it becomes deeply furrowed and rough. The mature bark is dark gray or brown in color and often has prominent ridges and furrows. The texture and color of the bark can vary depending on the age and growing conditions of the tree.
4. Tree Form and Size:
Black locust trees are typically medium-sized, reaching heights of 30 to 70 feet. They have an upright, oval or rounded crown shape when fully grown. The branches tend to be brittle and have a tendency to break easily, especially during storms or high winds. This can result in the formation of multiple trunks or a more irregular shape in older trees.
5. Seed Pods:
After the flowering period, black locust trees produce seed pods that are dark brown or black in color. These pods are long and narrow, measuring around 2 to 4 inches in length. They contain several seeds and persist on the tree through the winter months. The presence of these pods can be another clue to help identify a black locust tree.
Remember, while these characteristics are typical of black locust trees, there can be variations depending on factors such as age, environmental conditions, and genetic variations within the species. It is always recommended to consult an expert or local resources for accurate identification.
