beaked earthstar
... that the whitish powder found on the spore sac of the beaked earthstar is made of crystalline calcium oxalate?
... that the whitish powder found on the <a href="./Spore" id="mwDA0" rel="mw:WikiLink" title="Spore">spore</a> sac of the <b id="mwDA4"><a href="./Geastrum_pectinatum" id="mwDA8" rel="mw:WikiLink" title="Geastrum pectinatum">beaked earthstar</a></b> <i id="mwDBA">(pictured)</i> is made of crystalline <a href="./Calcium_oxalate" id="mwDBE" rel="mw:WikiLink" title="Calcium oxalate">calcium oxalate</a>?