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"Poisonous" does not mean deadly. Some manifestations of toxicity are subtle. The dose, as always, determines if a plant is safe source of nutrients or a toxic hazard.

Scientific Name: Iris spp.

Common Name: Irises

Species Most Often Affected: cattle, humans, swine

Poisonous Parts: rhizomes and rootstocks

Primary Poisons: irisin, iridin, or irisine

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