Some trees with thorns in Pennsylvania are the Black Locust (Robina pseudoacacia), the Common Honeylocust (Gleditsia triacanthos L.), and the Cockspur Thorn (Crataegus Crus-galli, L.).
There are many trees with thorns in Pennsylvania. For example, locus trees, honeylocust trees, American Holly tree, large leave holly tree, striped maple tree, sugar maple tree, and silver maple.
