6. Belladonna (Atropa belladonna)
Belladonna or deadly nightshade is an extremely toxic herb that, when eaten, causes delirium, hallucinations and eventually death. Belladonna literally translates to 'beautiful lady', and during the Medieval period, women used the berries' juice to dilate their pupils to appear more attractive (do not try this!). Deadly nightshade has also been the poison of choice throughout history and literature, and its reputation led to the belief that witches could use it to fly. Belladonna belongs to the Solanaceae (nightshade) family which includes tomatoes, potatoes, and eggplants.