Black Locust
Robinia pseudoacacia · Fabaceae (Legume, Pea, or Bean family)
AI-generated identification · may be incorrect
Leaf Morphology
Leaf Type
Pinnately compound, deciduous leaves with numerous paired leaflets and a single terminal leaflet
Shape
Elliptical to oblong leaflets with rounded or slightly notched tips
Margin
Entire (smooth edges on all individual leaflets)
Arrangement
Alternate arrangement of the large compound leaves along the woody twigs
Venation
Pinnate venation on each individual leaflet with a distinct central midrib and branching lateral veins
Key Features
Pinnately compound leaves with oval leaflets, paired stipular spines at the nodes on young branches, deeply ridged dark brown bark, and drooping clusters of fragrant white flowers
Description
Black Locust is a medium to large deciduous tree known for its deeply furrowed dark bark, rigid thorns on young branches, and drooping clusters of fragrant white, pea-like flowers in spring. The delicate, fern-like compound foliage casts a light, dappled shade, making it a distinctive component of woodland edges.
Habitat
Found in open woods, disturbed areas, forest edges, along roadsides, and abandoned fields; prefers moist, rich, well-drained soils but highly adaptable to poor soils
Native Range
Native to the eastern United States, primarily the Appalachian region and the Ozark Plateau, but widely naturalized across North America, Europe, and Asia