The Herbarium at the University of Georgia Poisonous Plants of Georgia
The Herbarium of the University of Georgia, Athens, Georgia
Common Name:
Scientific Name:
Ragwort Senecio spp. L.
Family:
 Asteraceae
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This plant may be poisonous to both humans and animals. Please refer to the "Symptoms" section below for information regarding susceptiblity of animal species to poisoning.
Description:
 Ragworts are annuals or perennials with a woody rootstock. The leaves are alternate and simple. The inflorescence is yellow and resembles a sunflower or daisy.
Toxic Part: The concentration of pyrrolizidine alkaloids is highest in the upper leaves and flowers. However, it is important to note that total concentration of the pyrrolizidine alkaloids varies throughout the growing season.
Toxin: The toxic components are pyrrolizidine alkaloids.
Symptoms: General symptoms of poisoning in animals include depression, loss of appetite, weight loss, and liver disease leading to hepatic failure. Toxicity in horses is characterized by the abrupt onset of a variety of symptoms including head pressing, pacing, ataxia, chewing, yawning, drowsiness, and rectal straining. In cattle the symptoms are similar yet with a slower onset. Death usually results from poisoning.
Treatment: The pyrrolizidine alkaloids are converted to pyrroles by the animal's liver. The effect of the pyrroles is cumulative so once symptoms are recognized it is often too late to treat the animal. Livestock only feed on Senecio species when other more acceptable forage is unavailable.
References: 24, 79, 86, 138
This site is NOT a substitute for the advice of medical physician. Plant poisonings can, in certain cases, result in SERIOUS HARM AND EVEN DEATH. Please contact a physician or your local poison control center if you suspect any plant poisoning. A link to the Georgia Poison Control Center can be found on the "References and Links" page of this site.