BSA Online Image Collection, Plant Defence Mechanisms

Welcome to the Botanical Society of America's online image collection. We hope you enjoy a browse through our members' contributions. Please note: each image acts as a link to a page containing more information, and a larger version of the picture. RETURN TO THE IMAGE MAP

       
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Populus tremuloides (quaking aspen) Populus grandidentata (big tooth aspen) Populus alba with trichomes that remain on leaf Populus grandidentata (young leaf) Populus grandidentata
         
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Populus deltoides stem Populus deltoides adaxial side of stipular bud scale Populus deltoides cross section of stipular buds scales Populus deltoides adaxial surface of stipular bud scale Populus deltoides Bud cross section
         
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Populus deltoides Higher magnification Populus deltoides Bud anatomy Populus deltoides Leaf tooth clearing. Populus deltoides 1 um paradermal section of leaf tooth Populus tremuloides resin glands on leaf teeth
         
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Salix lucida stem, leaf margin and stipules with resin glands Salix lucida adaxial view of stipule with resin glands Salix lucida leaf lamina margin with resin glands Salix lucida leaf margin resin gland (SEM) secreting a strand of resin Populus grandidentata extra floral nectaries on young leaf
         
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Populus grandidentataa leaf with ant feeding on extra floral nectaries Populus grandidentata longitudinal section of extra floral nectary Populus grandidentata secreting extra floral nectaries Populus tremuloides extra floral nectaries  

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