Fossil pollen variety (IMAGE)
Caption
In this image, pollen grains from Croton hirtus, a flowering herb; Mabea occidentalis, a tropical evergreen tree; and Agropyron repens, a perennial grass, provide a glimpse of the extraordinary morphological variety of pollen and the relative simplicity of grass pollen.
Credit
Image courtesy Luke Mander and Surangi Punyasena
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