EYE OF SCIENCE / SCIENCE PHOTO LIBRARY EYE OF SCIENCE / SCIENCE PHOTO LIBRARY
Spider orchid pollen. Coloured scanning electron micrograph (SEM) of a pollinium of pollen from a late spider orchid (Ophrys holoserica) flower. A pollinium is a coherent mass of pollen that are transferred as a single unit during pollination. Magnification: x30, when printed 10 centimetres wide.
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