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I ris versicolor poisoning. General poisoning notes for Iris versicolor. Blue flag (Iris versicolor) is a native herb found in eastern and central Canada. This plant has been mentioned as causing poisoning in humans and animals, but case reports have not been found.eneral poisoning notes for Iris versicolor. Blue flag (Iris versicolor) is a native herb found in eastern and central Canada. This plant has been mentioned as causing poisoning in humans and animals, but case reports have not been found.
The root of the iris is where the largest concentration of toxins is found. Iris contains rhizomes and pentacylic terpenoids, which can cause vomiting, diarrhea, drooling and lethargy in cats and dogs. This plant is less toxic to humans, but can still cause nausea, vomiting, diarrhea and stomach pain if ingested.he root of the iris is where the largest concentration of toxins is found. Iris contains rhizomes and pentacylic terpenoids, which can cause vomiting, diarrhea, drooling and lethargy in cats and dogs. This plant is less toxic to humans, but can still cause nausea, vomiting, diarrhea and stomach pain if ingested.