Known As:  Crown of Thorns
Latin Name: Euphorbia mili
Description:  Succulent stems and well-developed, thin leaves. Leaves are about 2 inches long and oblong in shape. Stems are tangled and spiny, with the appearance of a bramble bush during the dormant period. Flowers are showy red bracts.
Poisonous Parts:  Milky sap.
Symptoms: Vomiting, drooling, diarrhea, abdominal pain, cramps, swelling around the mouth, difficulty breathing.  May cause tremors, heart and respiratory and/or kidney problems which are difficult for an owner to detect.
Treatment: Unless your cat is unconscious or having convulsions, induce vomiting.  Get immediate veterinary assistance.