Fruit bodies of the puffball mushroom Lycoperdon pyriforme growing on a decaying pine log. Specimens photographed near La Ronge, Saskatchewan, Canada. Version with 1 cm scale marker added.
<a href="//commons.wikimedia.org/w/index.php?title=User:Sasata&amp;action=edit&amp;redlink=1" class="new" title="User:Sasata (page does not exist)">Sasata</a>
CC BY 3.0
<span class="int-own-work" lang="en">Own work</span>