Actually, the act applies only to five plant species, two thistles, two docks and the common ragwort. (newscientist.com)
One example for such a plant occurring here in Germany is the infamous ragwort (Senecio jacobaea), which appears in the media again and again, because it leads to foodstuff contamination in teas and salads. (sciencedaily.com)
Liver damage is caused by many medications including acetaminophen (Tylenol) and by many plants including tansy ragwort and rattlebox. (1800petmeds.com)