Known As:  Ceriman, Cutleaf Philodendron, Heartland Philodendron, Hurricane Plant, Lacy Tree Philodendron, Mexican Breadfruit, Saddle Leaf Philodendron, Tree Philodendron, Swiss Cheese Plant.
Latin Name:  Philodendron family, Monstera family
Description: Climbing plant ranging in height from 1 to 3 feet.  Common houseplant.
Poisonous Parts:  All parts, especially leaves. Contains needle-like crystals of insoluble calcium oxalate which penetrates the skin and mouth causing discomfort.  Plants also contain proteolytic enzymes which release histamine and kinins that cause swelling and itching or burning sensations.  There have been occasional reports of these plants causing kidney failure in cats however these reports have not been well-verified.
Symptoms:  Oral, pharyngeal and esophogal irritant.  Salivation and edema (swelling). Drooling, vomiting, abdominal pain, cramps, diarrhea, swelling around the mouth and throat, difficulty breathing. Death may result from blockage of the windpipe. Philodendron can also be a slow acting poison.  The cat ultimately becomes listless.  There is loss of appetite, loss of weight and vomiting.  If the poisoning is discovered in time, a veterinarian can institute successful treatment.  If not, enough poison will have entered the body to destroy the organs. Moderate toxicity.
Treatment: Unless your cat is unconscious or having convulsions, induce vomiting.  Get immediate veterinary assistance.