Trunk and Bark of Dahurian Birch (<i>Betula davurica</i>)
<a rel="nofollow" class="external text" href="https://flickr.com/people/63518505@N00">Bob Gutowski</a>
CC BY 2.0
originally posted to <b><a href="//commons.wikimedia.org/wiki/Flickr" class="mw-redirect" title="Flickr">Flickr</a></b> as <a rel="nofollow" class="external text" href="https://flickr.com/photos/63518505@N00/4434021000">Betula davurica, Dahurian Birch</a>