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Honey Locust

Gleditsia triacanthos • Thorny Locust, Sweet Locust


Honey locust is a large deciduous tree, typically growing up to 30 meters tall. It is native to central North America, although it has been introduced worldwide due to its adaptability. It is rare in Southern Ontario and it prefers moist soils and river valleys. Honey locusts commonly has thorns, typically  3–10 cm long growing out of the branches, some reaching lengths over 20 cm.



Once or twice pinnately divided, compound leaf. 18-30 leaflets but no tip leaflet, with 4-7 paired branches on main stalk.


Reddish brown to black. Flattened pods, hairless, 15-40 cm long.


Trunk with thorns. Young bark brownish and smooth, with lenticels (pores). Mature bark furrowed and scaly-ridged.


White with a yellow blotch on the upper petals. Flowers hang in clusters near shoot tips. Flower in summer.

186 Trees

Heritage Tree

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