Red Maple Small 213×320 Medium 426×640 Large 682×1024 Download Tiff Original 1598×2400 | (281.9 KB) Description One of the pair of keys or winged fruits of Red Maple; the seed-bearing portion cut open to show the seed. Keywords Botany, flowers, kmaple, plants, pollen, pollination, seed Galleries Maple Trees Source: Asa Gray The Elements of Botany for Beginners and for Schools (New York, Cincinnati, Chicago: American Book Co., 1887)