Locust tree can mean:

• Any of a number of tree species in the genera Gleditsia or Robinia
• Honey locust, a leguminous tree with pods having a sweet, edible pulp
• Black locust, a leguminous tree with toxic pods but useful for making honey
• Or less commonly, "African locust bean tree" (Parkia biglobosa), which is also known as néré
• The carob tree, Ceratonia siliqua.

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