Robinia pseudoacacia, commonly known as the Black Locust, is a tree in the subfamily Faboideae of the pea family Fabaceae. It is native to the southeastern United States, but has been widely planted and naturalized elsewhere in temperate North America, Europe, Southern Africa and Asia.
With a trunk up to 0.8 m diameter , with thick, deeply furrowed blackish bark. The leaves are 10?25 cm long, pinnate with 9?19 oval leaflets, 2?5 cm long and 1.5?3 cm broad. Each leaf usually has a pair of short thorns at the base, 1?2 mm long or absent on adult crown shoots, up to 2 cm long on vigorous young plants. The intensely fragrant (reminiscent of orange blossoms) flowers are white, borne in pendulous racemes 8?20 cm long, and are edible. The fruit is a legume 5?10 cm long, containing 4?10 seeds.