Flowers deadly enough to kill humans were reportedly planted in a public park by a group of well-meaning girl guides.
The toxic corncockles were laid down by the youngsters in Jubilee Park, Royal Wootton Bassett, as part of a BBC Countryfile project in May, according to the council.
They were only discovered to be dangerous when curious photographer Mike McKee alerted authorities on August 14.
‘I had absolutely no idea what they were at first – I just saw them there and they looked a bit different,’ he said.
‘I looked in my flower book and it said these were scant and very rare, so I did a bit more research on them. When I Googled them I found out they could be deadly.’
Despite the seeds reportedly being able to kill anyone who pinched them, there were no casualties reported after they were planted by the 2nd Royal Wootton Bassett Guides.
The group was not immediately available for comment.
The corncockles can grow up to 3ft tall, and are covered with fine hairs.
As well as death, in high quantities the plant can cause stomach pain, vomiting, diarrhoea, dizziness, weakness and slow breathing.