black witches' butter
... that black witches' butter is a wood-decay fungus that loosens the bark of its host by disintegrating the vascular cambium?
... that <b id="mwCdE"><a href="./Exidia_glandulosa" id="mwCdI" rel="mw:WikiLink" title="Exidia glandulosa">black witches' butter</a></b> <i id="mwCdM">(pictured)</i> is a <a href="./Wood-decay_fungus" id="mwCdQ" rel="mw:WikiLink" title="Wood-decay fungus">wood-decay fungus</a> that loosens the <a href="./Bark_(botany)" id="mwCdU" rel="mw:WikiLink" title="Bark (botany)">bark</a> of its host by disintegrating the <a href="./Vascular_cambium" id="mwCdY" rel="mw:WikiLink" title="Vascular cambium">vascular cambium</a>?