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Quercus velutina (black oak), emerging catkins and leaves detailDecember 1972
Reynolds, P. J.
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Quercus rubra (northern red oak), emerging flowers and leaves detailApril 1978
Kohout, Kitty
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Quercus rubra (northern red oak), emerging catkins and leaves detailDecember 1972
Reynolds, P. J.
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Quercus palustris (pin oak), male flowers, buds and leaves detailMay 1985
Dritz, Ken
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Quercus palustris (pin oak), male flowers cluster and leaf tips detailMay 1985
Dritz, Ken
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Populus deltoides (eastern cottonwood), twig with female catkinsMay 1983
Kohout, Kitty
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Populus deltoides (eastern cottonwood), male flower detail