St. John's wort family
... that chemicals found in members of the St. John's wort family can cause photosensitivity in grazing animals?
... that chemicals found in members of the <b id="mwBcM"><a href="./Hypericaceae" id="mwBcQ" rel="mw:WikiLink" title="Hypericaceae">St. John's wort family</a></b> can cause <a href="./Photosensitivity" id="mwBcU" rel="mw:WikiLink" title="Photosensitivity">photosensitivity</a> in grazing animals?