Fuller, Thomas C. Formerly, Botany and Seed Laboratories, California Department of Food and Agriculture, Sacramento, California.
- Glycoside-containing plants
- Alkaloid-containing plants
- Heath plants
- Oxalate poisoning
- Nitrate poisoning
- Allelopathic toxins
- Links to Primary Literature
- Additional Readings
More than 700 species of seed plants, ferns, horsetails, and fungi that cause toxic, though rarely fatal, reactions in humans and animals (see illustration). Human allergic responses, including hay fever, asthma, and dermatitis, are widespread. Allergic responses are produced by many different plant species, but most common are poison ivy, poison sumac, and Pacific poison oak (all are species of Toxicodendron). Internal injury by toxic plants is less common but can be detrimental or lethal. See also: Asthma; Poison ivy; Poison sumac
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