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Gleditsia triacanthos L.
Honey locusts, Gleditsia triacanthos, can reach a height of 20–30 m, with fast growth, and are relatively short-lived; their life spans are typically about 120 years, though some live up to 150 years. They are prone to losing large branches in windstorms. The leaves are pinnately compound on older trees but bipinnately compound on vigorous young trees. The leaflets are 1.5–2.5 cm (smaller on bipinnate leaves) and bright green. It commonly have thorns 3–10 cm long growing out of the branches, some reaching lengths over 20 cm; these may be single, or branched into several points, and commonly form dense clusters. The thorns are fairly soft and green when young, harden and turn red as they age, then fade to ash grey and turn brittle when mature.
Native to central North America.
The tree has been used in traditional Native American medicine. Extracts of Gleditsia possess important pharmacological activities in treating rheumatoid arthritis, as anti-mutagenic, anticancer and have significant cytotoxic activity against different cell lines. Other names: thorny locust