Help identify this acorn/nut?


New Member
I was collecting acorn specimens from a group of trees that were planted in the median along my road when I stumbled upon this strange looking acorn and then another and another. The tree that they were under looked just like all the others to me- but what do I know? All the leaves had fallen already. I've been searching for hours but can't find a match anywhere. Found in Jacksonville Florida January. Any ideas? Thanks so much!1484678820993-134609583.jpg 1484678820993-134609583.jpg 1484678958461-1951192249.jpg