Horse chestnut leaf, SEM
Horse chestnut leaf. Coloured scanning electron micrograph (SEM) of the underside of a horse chestnut leaf (Aesculus hippocastanum) Numerous hairs (trichomes) cover the surface, they protect the plant from small herbivores and reduce the amount of evaporation from the leaf's surface. Magnification: x50 when printed at 10 centimetres wide., Photo by STEVE GSCHMEISSNER/SCIENCE PHOTO LIBRARY
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