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Every entry has information and references on human and non-human effects of poisonous plants.
Poison Plant of Florida Plants causing Rhus-dematitis this site has pictures of Posion Ivy in different stages of growth. Guide to Poisonous Plants Has searchable database of definitions and photos. From the College of Veterinary Medicine and Biomedical Sciences at Colorado State University. Poison Ivy, Oak, and Sumac Information Center Provides information on how to identify, cure, treat, and exterminate these plants. Some favorites such as Foxgloves and Bleeding Hearts are potentially fatal.