Poisonous Plant Quiz

Poison HemlockThat's right! Poison Hemlock is found throughout North America in water areas, roadsides and dry ditches. It is distinguished from other members of the carrot or parsley family by its smooth stems with reddish purple spots and finely divided leaves.

Poison Hemlock contains assorted piperidine alkaloids that cause respiratory failure in less than three hours.

After ingestion, the following symptoms may be observed:

  • frothing at the mouth
  • uneasiness
  • dilated pupils
  • weak, rapid pulse
  • convulsions
  • clamping of jaws

Stimulants administered immediately and supportive therapies may help to counteract the effects of the poison conine found in this weed.

Death may occur within 15 minutes.

A veterinarian should be consulted immediately for supportive treatment to reduce the damage caused by ingestion of poisonous plants.

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For more information:
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E-mail: ag.info.omafra@ontario.ca

Author: Penny Lawlis - Animal Care Specialist/OMAFRA
Creation Date: Not Available
Last Reviewed: November 2003