Known As:  Mistletoe
Latin Name:  Viscum album
Poisonous Parts:  White berries, leaves, stems.  Toxins are toxalbumins.
Symptoms: Drooling, vomiting, diarrhea, abdominal cramps, swelling around the mouth, difficulty breathing, convulsions, coma.
Treatment: Unless your cat is unconscious or having convulsions, induce vomiting and initiate procedures to delay absorption and speed elimination.  Get immediate veterinary assistance.