Aconitum Napellus is commonly known as wolf’s bane. This common name comes from the fact that this plant was once used to poison arrows that were then used to hunt wolves. It is also sometimes referred to as monkshood and helmet flower because of its shape. It is found in moist mountains and pastures in Europe and Asia. All parts of the plant are poisonous but especially the roots and seeds.  The leaves and roots are used to make the drug aconite which used to be prescribed as a cardiac and respiratory sedative.  The presence of the alkaloid aconitine is what makes this plant poisonous.