A cordon has been put in place in Green Park after highly poisonous hemlock plants were found around the beauty spot.
Visitors to Green Park are being warned to 'take care and avoid contact or consumption' after the plants were recently identified on the land.
Hemlock, which looks similar to cow parsley with clusters of big white flowers, a tall slender stem, and green leaves, is one of the most toxic plants to humans and animals and can be fatal if ingested.
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Symptoms after ingestion can include trembling, weakness, dilated pupils, breathing problems and, in severe cases, respiratory failure.
Hemlock found in Green Park, Reading (Image: NQ)
In the meantime, signage has been installed to make people aware, along with relevant safety advice.
The area is currently under treatment. The walk around the nature reserve remains open to the public.
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