EYE OF SCIENCE / SCIENCE PHOTO LIBRARY EYE OF SCIENCE / SCIENCE PHOTO LIBRARY
Valerian (Valeriana officinalis) flower, coloured scanning electron micrograph (SEM). At centre is the pistil, the female reproductive structure, with a stamen, the male reproductive structure, either side of it. Magnification: x25 when printed at 10 centimetres tall.
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