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Oleander is an ornamental shrub with pink, red, or white flowers commonly found in warm climates. Every part of the plant is toxic, containing cardiac glycosides like oleandrin that can disrupt the heart’s electrical activity.
Rhododendrons, including azaleas, contain grayanotoxins that can alter sodium channels in the body, affecting the nervous system and muscles.
Deadly nightshade is a herbaceous perennial with purple bell-shaped flowers and shiny black berries.
The castor bean plant is the source of castor oil, yet its seeds contain the deadly poison ricin ⁴. Ricin inhibits protein synthesis, causing cell death.