Clitocybe geotropa
... that a fairy ring of the mushroom Clitocybe geotropa in France is over half a mile (0.8 km) in diameter and 800 years old?
... that a <a href="./Fairy_ring" id="mwBEA" rel="mw:WikiLink" title="Fairy ring">fairy ring</a> of the mushroom <i id="mwBEE"><b id="mwBEI"><a class="mw-redirect" href="./Clitocybe_geotropa" id="mwBEM" rel="mw:WikiLink" title="Clitocybe geotropa">Clitocybe geotropa</a></b></i> <i id="mwBEQ">(pictured)</i> in France is over half a mile (0.8 km) in diameter and 800 years old?