Plant that produced Ritual Death-smile.

Hemlock water dropwort plant, and is very poisonous. If a person dies due to eating this plant,then there is a big smile on his face.                                                                   The plant grows wild across the island of Sardinia and was used in the ancient Sardinia's death rituals.                                   The plant was used in pre-Roman times for the ritual killing of old people who had become a burden of society.