Common Poisonous Plants and Mushrooms of North America by Nancy Turner and Adam Szczawinski
There are really no alternatives currently in print to this book. Turner and Szczawinski are ethnobotanists who have written extensively on edible wild plants. And while they are not toxicologists, they have done an excellent job of putting together technical, academic, and medical information about North American poisonous plants, mushrooms, sea vegetables, and more. Their…