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Early bur oak acorn, St. Paul, MN
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Immature berries on pagoda dogwood, Cornus alternifolia
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Early acorn formation on bur oak, Quercus macrocarpa
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Immature seeds on hackberry, Celtis occidentalis
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Immature seeds on hackberry, Celtis occidentalis
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Seed formation on basswood, Tilia americana
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Partially developed nuts on black walnut, Juglans nigra
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Early acorn development on bur oak, Quercus macrocarpa
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Early acorn development on bur oak, Quercus macrocarpa
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Early acorn development on bur oak, Quercus macrocarpa
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Early acorn development on bur oak, Quercus macrocarpa
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Early bur oak acorn up close
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Red pine cone cut open to show almost mature seed and some decay
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Almost-mature red pine cone on cone cutter
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Almost mature red pine cone with some decay at the tip
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Cones of a mature, fallen balsam fir
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Cones of a mature, fallen balsam fir
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Cones of a mature, fallen balsam fir
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Cone production on a <3-foot black spruce, Abies mariana
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Cone production on a <3-foot black spruce, Picea mariana
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Female (upper left) and male (lower right) cones on red pine near Stillwater MN May 19 2017
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Curent and last year's female cones on red pine near Stillwater MN
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Larch cones at Versailles2
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Larch cones at Versailles
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Jack pine seedling and cones near Baudette MN
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White spruce cones in winter, Pine County MN
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Closed jack pine cones, Cloquet MN (closer)
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Closed jack pine cones, Cloquet MN
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This year's and last year's cones on Mugo pine
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Maturing Mugo pine female cone in spring
