The Most Dangerous Plant In Each State

6. Arizona – Castor Bean Plant (Ricinus communis)

Common in warm Arizona climates, the castor bean plant is visually dramatic with large leaves and spiky seed pods. Its seeds contain ricin, one of the most toxic substances known. Ingesting chewed seeds can cause organ failure and death within days. The flowers are small and easily overlooked, offering no warning. Although castor oil itself is safe once processed, raw seeds are lethal. Because the plant is sometimes grown ornamentally, accidental poisonings remain a concern, especially for children and pets attracted to its unusual appearance