The minimal features for describing a pollen grain are:
size, shape, aperture condition, ornamentation, and the method, how the pollen grain was prepared for LM and EM, respectively.
LM- and SEM-diagnosis may be different from each other, due to the methods and techniques used.
LM-diagnosis plant name: Centaurea jacea (Asteraceae)
method: pollen grains acetolyzed size: medium (longest axis about 40 |_im]
shape (determined by equatorial and polar view]: prolate aperture: tricolporate
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