Sticta
... that some species in the lichen genus Sticta can be used to assess the age of forests?
... that some species in the <a href="./Lichen" id="mwD3E" rel="mw:WikiLink" title="Lichen">lichen</a> genus <i id="mwD3I"><b id="mwD3M"><a href="./Sticta" id="mwD3Q" rel="mw:WikiLink" title="Sticta">Sticta</a></b></i> <i id="mwD3U">(Sticta hypochra pictured)</i> can be used to assess the age of <a class="mw-redirect" href="./Forests" id="mwD3Y" rel="mw:WikiLink" title="Forests">forests</a>?