Trees of Alabama and the Southeast

Lisa Samuelson, Ph.D.
School of Forestry and Wildlife Sciences
Auburn University

BLACK LOCUST
Robinia pseudoacacia
Fabaceae

Leaves are pinnately compound, alternate, and deciduous with 7-25 leaflets that are 1/2-2 inches long. Twigs are stout with paired stipular spines at each node. Bark is light brown becoming deeply furrowed with corky prominent ridges. Flowers are white, fragrant, pea-like and showy. Fruit is a legume, 2-4 inches long. Form is up to 21 m (70 ft) in height and 61 cm (2 ft) in diamter and can form thickets. Black locust is found on a variety of sites in open areas in the east and central US. Intolerant of shade. The heavy wood is used for pulp and railroad ties. Cultivars are available for landscaping.

Photographs by Mike Hogan.

To view examples, click on the thumbnail below: