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Crown of Thorns


Poisonous to: Cats, Dogs, Horses, Cows

Level of toxicity: Generally mild to moderate

Common signs to watch for:

  • Drooling
  • Vomiting
  • Diarrhea
  • Skin irritation
  • Eye irritation

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Euphorbia species plants may cause irritation to the mouth, gastrointestinal tract, skin, and eyes following exposure. This is largely due to the milky sap within the plant that contains numerous irritants.

Poison type: Plants

Scientific name: Euphorbia milii

Alternate names: Christplant, Christ plant, Christ thorn