The minute calicioid lichens are especially abundant on sheltered tree trunks in these southern forests near the limit of the steppe.  The largest, Calicium viride, is so healthy that it is clearly visible even to the naked eye!
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/7147684@N03">Jason Hollinger</a>
CC BY 2.0
<p><a rel="nofollow" class="external text" href="https://www.flickr.com/photos/7147684@N03/3306766264/">Calicium viride</a>
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