Lily of the Valley, all parts of this plant are highly poisonous, including the red berries which can be very attractive to young children. Symptoms of ingestion can include abdominal pain, vomiting, and a reduced heart rate.
“From Oleander I learned that when one is skilled in the use of poisons, there is always someone willing to pay for the quiet disappearance of a rival, the death of a brutal husband, or the tragic fatal illness of a sibling whose inheritance one covets.” - The Poison Diaries
The poisonous plant, Datura aka Thornapple one of the most deadliest poisonous plants.
Due to the combination of anticholinergic substances contained in Datura, intoxication produces effects similar to that of an anticholinergic delirium. A inability to differentiate reality from fantasy, hyperthermia, tachycardia, bizarre and possibly violent behavior as well as severe mydriasis with resultant painful photophobia that can last several days.
Morning Glory is a popular ornamental plant and used in medicine, however it is a toxic plant as it contains many alkaloids. The seeds may cause hallucinations, neurological damage and severe diarrhoea. Ingestion of the seeds can be particular dangerous if the victim has a history of liver disorders.
Wisterias form romantic cascades of sweetpea-like flowers that fall in lush blue, pink or white masses from woody vines that grow mainly in the South and Southwest. The entire plant, also known as a kidney bean tree, is toxic, though some say the flowers are not. Reports say eating this plant can cause nausea, vomiting, cramps and diarrhoea. That could require treatments such as intravenous hydration and anti-nausea pills. So don’t try your luck when encountering this plant.
The blood flower is a type of tropical milkweed with toxic milky sap that is emetic. It’s also historically favoured as a heart stimulant and worm repellant.