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



Populus tremuloides (quaking aspen)	Populus grandidentata (big tooth aspen)	Populus alba with trichomes that remain on leaf	Populus grandidentata (young leaf)	Populus grandidentata


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


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


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


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