Stay Clear of Poison Hemlock on Township Grounds

RARITAN TWP., N.J. (Hunterdon County) — The Raritan Township Department of Public Works (“DPW”) is advising parkgoers to be aware of and avoid poison hemlock sprouting on township parks and open space grounds.

Like the infamous poison ivy quote, “leaves of three, let it be,” it is best to avoid poison hemlock because every aspect of the plant is dangerous if ingested –  leaves, stem, fruit, and root. Poison hemlock is not only toxic to domestic animals (e.g., sheep, cattle, and horses), if ingested, it can be fatal to humans as well. However, unlike poison ivy, it does not cause a blistering rash if you come into contact with it. Poison hemlock is only dangerous if ingested.

Image Credit: Bryant Bauer, ARM Group

According to the U.S. Department of Agriculture, poison-hemlock is highly poisonous with white flowers that grow in small erect clusters that develop into a green, deeply ridged fruit that contains several seed. They are particularly found near roadsides, on edges of cultivated fields, along creek beds and irrigation ditches, and in waste areas.

If you feel that you or your pet may have had an encounter with poison hemlock, here are some indicators to be aware of:

• Nervous trembling;
• Stimulation followed by depression Ataxia, especially lower and hind limbs;
• Salivation;
• Lack of coordination;
• Dilation of the pupils;
• Rapid, weak pulse;
• Respiratory paralysis;
• Coma;
• Death;
• Convulsions;
• Occasionally bloody feces and gastrointestinal irritation; and
• Skeletal birth defects occur in calves when cows eat poison-hemlock between 40 and 70 days of gestation.

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Disclaimer: The information provided within this article and throughout the Raritan Township (hereinafter “Township”) website is for informational and educational purposes only. The Township bears no responsibility for the information herein and the content should not be interpreted as medical advice, diagnosis, or treatment. This is not a substitute for professional medical advice, and you should always consult with a qualified healthcare professional for any health concerns or before making any decisions related to your health or treatment.

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