HEMLOCK, CONIUM MACULATUM
Hemlock is also correctly termed Poison Hemlock. It is native to Europe , parts of North Africa , Iran and temperate regions of Asia . It is famous because it was the main constituent of the potion given to Socrates as it was to other criminals in ancient Greece .
Plato gives us this description of the death of Socrates which aptly describes how Socrates died.
”Socrates walked about, and presently, saying that his legs were heavy, lay down on his back – that was what the man recommended. The man – he was the same one who had administered the poison – kept his hand upon Socrates, and after a little while examined his feet and legs, then pinched his foot hard and asked if he felt it. Socrates said no. Then he did the same to his legs, and moving gradually upward in this way let us see that he was getting cold and numb. Presently he felt him again and said that when it reached the heart, Socrates would be gone.”

The toxic principle components of this plant are g-coniceine and coniine, the latter being the most toxic. It has been used in medicine as a sedative and an antispasmodic among uses.

Some of the symptoms of poisoning by hemlock are: - a burning sensation in the mouth; excessive salivation; diarrhoea; muscle tremors; muscular weakness; dim vision and frequent urination.

The name hemlock comes from the Anglo-Saxon, hem meaning border or shore, and leac meaning plant or leek. In Anglo-Saxon healm also means straw and the name could also have come from this.
It is highly poisonous and should not be touched.