five-horn smotherweed
... that five-horn smotherweed is so toxic to sheep, they have been known to die after just one feeding?
... that <b id="mwCTo"><a href="./Bassia_hyssopifolia" id="mwCTs" rel="mw:WikiLink" title="Bassia hyssopifolia">five-horn smotherweed</a></b> <i id="mwCTw">(pictured)</i> is so toxic to <a href="./Sheep" id="mwCT0" rel="mw:WikiLink" title="Sheep">sheep</a>, they have been known to die after just one feeding?