A younger and an older specimens from underside.
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/32769754@N00">apa3a</a>
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<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/32769754@N00/563051219/">2007-06-15 5 Stropharia Rugosoannulata</a>