Poinsettia

Are poinsettia poisonous to humans? Not much, it may cause nausea, diarrhea, or vomiting if consumed.

An excerpt from the article 16 facts about Poinsettia
External exposure to the plant may result in a skin rash. It may also cause itchiness, redness, or swelling. It's not severely harmful to animals too. Dog or cat's exposure to poinsettias rarely requires medical treatment. After ingestion it may cause vommitting, drooling and sometimes a diarrhea.