dune brittlestem
... that the dune brittlestem has a symbiotic relationship with marram grass?
... that the <b id="mwD6A"><a href="./Psathyrella_ammophila" id="mwD6E" rel="mw:WikiLink" title="Psathyrella ammophila">dune brittlestem</a></b> has a <a class="mw-redirect" href="./Symbiotic" id="mwD6I" rel="mw:WikiLink" title="Symbiotic">symbiotic</a> relationship with <a class="mw-redirect" href="./Marram_grass" id="mwD6M" rel="mw:WikiLink" title="Marram grass">marram grass</a>?