Horsewoman Sandra Burger researched and compiled information on more than 100 common but toxic plants that grow in backyards, pastures and along trails. Dr. A.P. Knight, a leading expert on horse poisonings, has lent his advise on how to recognize symptoms of poisonings and what steps you or your veterinarian should take if one suspects a horse has eaten a toxic plant. Plants are listed as: Trees; Bushes, Shrubs & Vines; Ferns & Palms; Weeds & Wildflowers; Grasses & Horsetails. Each plant has a full color photo plus close up photo of leaves or flower, description of plant, geographic distribution, signs of poisoning and what to do.