Datura inoxia-Here in Puerto Rico species of the Datura and Brugmansia genera are commonly referred to as Campana (Bell, in reference to the flower) and are notorious for the hallucinations and delirium they can cause when ingested.
Anagallis arvensis (Scarlet Pimpernel). Iconic flower from which the play of the same name gets it's title. Medicinally useful for epilepsy and wound-healing in addition to having antiviral and antifungal properties