22. Illinois – Dumbcane (Dieffenbachia spp.)
Dumbcane is a popular ornamental plant in Illinois homes and offices, recognized for its large variegated leaves. Its leaves and stems contain calcium oxalate crystals that can cause immediate oral pain, swelling, and difficulty swallowing if ingested. In severe cases, breathing can be impaired. While not usually fatal, small children or pets can experience dangerous reactions. Even touching the plant and transferring sap to the mouth or eyes can cause irritation. The plant’s aesthetic appeal masks the serious risk it poses in everyday household environments.
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