Geastrum saccatum
... that the characteristic star-shaped dehiscence of the fungus Geastrum saccatum is thought to be due to the buildup of crystalline calcium oxalate?
... that the characteristic star-shaped <a href="./Dehiscence_(botany)" id="mwBZ8" rel="mw:WikiLink" title="Dehiscence (botany)">dehiscence</a> of the fungus <i id="mwBaA"><b id="mwBaE"><a href="./Geastrum_saccatum" id="mwBaI" rel="mw:WikiLink" title="Geastrum saccatum">Geastrum saccatum</a></b></i> <i id="mwBaM">(pictured)</i> is thought to be due to the buildup of crystalline <a href="./Calcium_oxalate" id="mwBaQ" rel="mw:WikiLink" title="Calcium oxalate">calcium oxalate</a>?