Multiple techniques and methods should be used when investigating pollen grains in order to provide comprehensive and accurate information and help to avoid misinterpretations. Good examples of such an approach are the endexine (mentioned below) and the endoaperture, the latter visible only in the light microscope (LM) and hidden in the scanning electron microscope (SEM).
The selection of micrographs in "Pollen Terminology. An illustrated Handbook" in cludes both LM and EM pictures.
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