a few exceptions, those plants are not included here (see list of allergens instead). Despite the wide variety of plants considered poisonous, human fatalities caused by poisonous plants – especially resulting from accidental ingestion – are rare in the developed world. Poisonous plants that are food Many plants commonly used as food possess toxic parts, are toxic unless processed, or are toxic at certain stages of their lives. Some only pose a serious threat to certain animals (such as cats, dogs, or livestock) or certain types of people (such as infants, the elderly, or individuals with pathological vulnerabilities). Most of these food plants are safe for the average adult to eat in modest quantities. Notable examples include: Other poisonous plants Countless other plants not commonly used in food or drink are also poisonous, and care should be taken to avoid accidentally contacting or ingesting them. Some of these are popular ornamental plants or are cultivated for purposes other than consumption. See also List of plants poisonous to equines List of poisonous fungus species List of venomous animals Biopesticide Mushroom poisoning Psychoactive plant Secondary metabolite Toxin Weed References Bibliography External links US Army: Guide to poisonous and toxic plants Cornell University Poisonous Plants Information Database po Poisonous Poisonous Poisonous Toxicology Hazards of outdoor recreation Poisonous plants