Monkshood (noun)

A poisonous Eurasian plant with spikes of blue or purple hood-shaped flowers, typically used as a medicinal plant in the past.

Origin:

Late middle english: from monk's hood, from the shape of the flower's upper lip, supposed to resemble a hood worn by a monk.

Examples:

1. The monkshood plant is often grown in cottage gardens for its attractive flowers.
2. All parts of the monkshood plant are toxic if ingested.
3. The monkshood was used as a poison by ancient civilizations.
4. The delicate beauty of the monkshood belies its lethal nature.
5. The dried root of the monkshood plant was used to make arrow poisons.