There was some elm leaves under the tree. But there was also maple and oak from the other trees around there. I didn't see any maple seeds under the tree as they are "helicopter" seeds.
It would be hard to believe that these long black seed pods dropped directly below this tree from the other black locust tree. It was 8' away and there wasn't many seed pods under it....
Were there any seed pods still hanging on the tree? Some always seem to hang on and make it through the winter on the Black Locust here in town.
Not sure what it is, but it does not look like any of the Locust varieties that I am familiar with.