Little pins of the Beech Mushroom (<i>Hypsizygus tessulatus primordia</i>), also known as Buna-shimeji, growing on a sawdust block. Cloned from a store-bought mushroom.
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/48016763@N00">frankenstoen</a> from Portland, Oregon
CC BY 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/48016763@N00/2575260975/">Hypsizygus tessulatus primordia</a>