This is the fruit, or samara, of Blue Ash, Fraxinus quadrangulata, (Keeler, 1915).
Harriet L. Keeler, Our Native Trees and How To Identify them (New York:Charles Scribner's Sons, 1915) 216
878×1600, 1.4 MiB
561×1024, 66.7 KiB
351×640, 35.6 KiB
175×320, 13.2 KiB