GEORGETTE DOUWMA / SCIENCE PHOTO LIBRARY GEORGETTE DOUWMA / SCIENCE PHOTO LIBRARY
Oyster mushrooms (Pleurotus ostreatus) growing on a tree trunk. These fruiting bodies (reproductive structures) are produced year-round by the fungus in large clusters, and are usually found on stumps and fallen or standing deciduous trees, especially beech. The blue-grey mushrooms are edible. Photographed in Britain.
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