Deformed clouded agaric (<i>Clitocybe nebularis</i>), a mushroom that grows on another mushroom. Rare malformation (<i><a href="//commons.wikimedia.org/wiki/Category:Teratology" title="Category:Teratology">Teratology</a></i>).
<a href="//commons.wikimedia.org/wiki/User:Famberhorst" title="User:Famberhorst">Dominicus Johannes Bergsma</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>