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Ceiba pentandra
The oldest tree in the Dominican Republic. Has large thorns like a rose.
Forest in northern Dominican Republic.
Taken by a friend in Dominican Republic. Exact location unknown.
Thanks for the ID, gatorfellows! I think it's the correct ID, so I'm going to use it, at least until someone might say they think otherwise.
Not 100% sure of the suggestion, but your spotting has several of the characteristics. You decide.