Sources:

Five Beautiful and Deadly Poisonous Flowers:
https://vaulteditions.com/blogs/news/ten-beautiful-and-deadly-poisonous-plants

7 of the World’s Deadliest Plants:
https://www.britannica.com/list/7-of-the-worlds-deadliest-plants

Belladonna:
https://medlineplus.gov/druginfo/natural/531.html

Anticholinergic Toxic Syndrome Caused by Atropa Belladonna Fruit (Deadly Nightshade):
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4894214/

Antinociceptive activity of Ricinus communis L. leaves:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3609173/