Locust tree is a plant species of the genera Gleditsia, Robinia, Parkia, Hymenaea, and Ceratonia. Examples of species are G. triaconthos (honey locust), G. aquatica (water locust), R. pseudoacacia (black locust), Parkia biglobosa (African locust bean tree), and C. siliqua (carob tree). R. pseudacacia, in particular, is a large North American tree producing large slender racemes of white, fragrant, papilionaceous flowers, and often cultivated as an ornamental tree. In England it is called acacia. H. courbaril is a lofty, spreading tree of south America. C. siliqua is a tree growing in the Mediterranean region.
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