These little flowers piled on my car are from maple trees. I am very allergic to them. They are everywhere right now and they give me pounding headaches.The maple tree is very common on Long Island and its reproductive cycle occurs before it produces leaves. At this time of the spring, the maple trees are all covered in yellow flowers so heavily that it looks like the trees have all their leaves. But in fact there are no leaves, just the little yellow flowers pumping out clouds of pollen. The flowers then drop and the leaves start coming in. If my head didn't hurt so much I might actually enjoy it.