gray-leaf willow
... that the gray-leaf willow is a rich source of calcium and phosphorus for its browsers?
... that the <b id="mwDrQ"><a href="./Salix_glauca" id="mwDrU" rel="mw:WikiLink" title="Salix glauca">gray-leaf willow</a></b> <i id="mwDrY">(pictured)</i> is a rich source of <a href="./Calcium" id="mwDrc" rel="mw:WikiLink" title="Calcium">calcium</a> and <a href="./Phosphorus" id="mwDrg" rel="mw:WikiLink" title="Phosphorus">phosphorus</a> for its <a href="./Browsing_(herbivory)" id="mwDrk" rel="mw:WikiLink" title="Browsing (herbivory)">browsers</a>?