Three-thorned Acacia Gleditsia triacanthos

The Three-thorned Acacia (Gleditsia triacanthos) is the principal species, and is indigenous to the states west of the Alleghanies. G. monosperma is another kind, which is scarcely distinguishable from the Three-thorned, except in having one-seeded pods. The seedlings raised from G. triacanthos are often entirely destitute of thorns.