Every part of the philodendron, a very popular houseplant, are poisonous. They cause burning and swelling of the mouth and throat and nausea, and can damage the kidneys of both humans and pets. Other common houseplants cause the same symptoms, such as pothos, calla lily, anthurium, and peace lily. Dieffenbachia, also known as dumb cane causes similar symptoms to the Philodendron if ingested, but the reaction can be more severe. Swelling of the mouth and throat can prevent speech, swallowing, and even breathing.
All parts are poisonous, and the sap from the stems can cause skin rashes.
Popular holiday decorations include holly and mistletoe. They produce small berries which are toxic, mistletoe being the most toxic of the two. Holly berries can cause stomach pain, nausea, and diarrhea. Mistletoe can also cause a slow pulse and loss of consciousness. Another common holiday decoration is the yew, which also has red berries that can lead to convulsions, coma, and possibly death.