Robinia pseudoacacia L. - Black Locust


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Robinia pseudoacacia - (image 1 of 3)



Family: Fabaceae


Fencerows, roadsides, pastures, moist woodlands. Thrives on limestone soils.




Native from PA, IN to OK, south to GA and AL. Naturalized throughout the U.S. and parts of Canada.


Tree to 25 m.  Leaves pinnate compound; leaflets 7-19, oval to elliptic. Flowers white, fragrant, numerous in drooping racemes.


Flowers early May to mid June

Wetland indicator: Facultative upland-

Native to the Southeast but has been widely planted as an ornamental and for erosion control. Has become naturalized over a large portion of the East and is a troublesome weed in some areas.



Farrar, J. L. 1995. Trees of the Northern United States and Canada.
Ames, Iowa: Iowa State University Press


Gleason, Henry A. and A. Cronquist. 1991. Manual of Vascular Plants of Northeastern United States and Adjacent Canada. Second Ed.

The New York Botanical Garden. Bronx, NY


Swink, F. and G. Wilhelm. 1994. Plants of the Chicago Region.
Indiana Academy of Science. The Morton Arboretum. Lisle, Illinois.



 Michael Hough 2005