29. Mississippi – Rosary Pea (Abrus precatorius)
Rosary pea grows sporadically in Mississippi and is known for its striking red seeds with black markings. The seeds contain abrin, one of the most potent plant toxins in the world. Even a single chewed seed can cause vomiting, organ failure, and death. Historically, seeds were used in jewelry, leading to accidental poisonings. While the vine itself is attractive with small flowers, its deadly seeds pose hidden dangers to children, pets, and unsuspecting adults. Extreme caution is required when handling or encountering this plant in the wild or gardens.
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