Petra van Cronenburg<p>Even in the darkest <a href="https://mastodon.online/tags/winter" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>winter</span></a>, there are <a href="https://mastodon.online/tags/colours" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>colours</span></a> in our <a href="https://mastodon.online/tags/naturepark" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>naturepark</span></a> <a href="https://mastodon.online/tags/VosgesDuNord" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>VosgesDuNord</span></a>. You find them on <a href="https://mastodon.online/tags/wood" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>wood</span></a>, mostly <a href="https://mastodon.online/tags/DeadWood" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>DeadWood</span></a>. <a href="https://mastodon.online/tags/WinterSolstice" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>WinterSolstice</span></a> <a href="https://mastodon.online/tags/fungi" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>fungi</span></a> <a href="https://mastodon.online/tags/lichensubscribe" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>lichensubscribe</span></a> </p><p><a href="https://mastodon.online/tags/GreenElfcup" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>GreenElfcup</span></a> Chlorociboria aeruginascens (blueish-green), <a href="https://mastodon.online/tags/DryRot" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>DryRot</span></a> (brown) and <a href="https://mastodon.online/tags/YellowScale" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>YellowScale</span></a> (yellow).</p><p>The beautiful yellow <a href="https://mastodon.online/tags/lichen" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>lichen</span></a> Xanthoria parietina is resistant to <a href="https://mastodon.online/tags/pollution" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>pollution</span></a> and used as a <a href="https://mastodon.online/tags/biomonitor" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>biomonitor</span></a> for heavy metals and <a href="https://mastodon.online/tags/nitrogen" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>nitrogen</span></a> pollution. You find it often near agriculture because it looks for high nitrogen levels in the air.</p>