By John W. Everest, Thomas A. Powe Jr., and John D. Freeman,
Poisonous plants cause significant annual losses of money through injury to humans and livestock. No verifiable sums are available, but figures as high as “several million dollars” are often quoted. Undoubtedly, poisonous plants reduce productivity, and some can even kill people and all classes of livestock. If people could quickly recognize some of the more common poisonous plants, they might avoid injury. In addition, livestock producers could remove poisonous plants from fence lines and pastures where feasible.