Since moving to Florida, I have found the Pacara Earpod Tree, Enterolobium contortisiliquum, fascinating. I have photographed it several times: here and here. These are the seed pods that give the tree its name and are about 7 cm in diameter. Not surprisingly, the tree is a member of the pea family. And being a member of the legume family, this tree is a huge nitrogen fixer. It is, however, an invasive species. Click on the image for a larger view.