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Calla Lily
Zantedeschia aethiopica or Zantedeschia spp.
Calla Lily (Zantedeschia aethiopica) is often called a lily but is an "imposter lily" — it does NOT cause the acute kidney failure associated with true lilies (Lilium and Hemerocallis species) and is significantly less dangerous. However, it is still toxic to cats. Like all Araceae plants, Calla Lily contains insoluble calcium oxalate crystals (raphides) throughout its leaves, stems, and spathe. These needle-like crystals cause immediate mechanical injury to the soft tissues of the mouth and throat when the plant is chewed.
Important Notes
Symptoms: Immediate oral pain, intense drooling, pawing at the mouth, swelling of the mouth and throat, and difficulty swallowing; vomiting may follow.
Not a true lily: Unlike Lilium (Easter lily, Tiger lily) or Hemerocallis (day lily) species, Calla Lily does not damage the kidneys and is far less life-threatening.
Action: Rinse the cat's mouth with water to flush crystals. Contact a vet if swelling is significant or symptoms persist beyond an hour.
Potentially Toxic Parts
Stem
Leaf
Entire Plant
Possible Symptoms Reported in Cats
Dyspnea (Difficulty breathing) due to laryngeal edema
Respiratory · Rapid (as swelling develops).
Intense burning sensation, pain, and irritation of the mouth, tongue, and lips
Gastrointestinal · Immediate upon chewing or biting into the plant.
Hypersalivation (Drooling)
Gastrointestinal · Immediate to rapid.
Vomiting and Anorexia (Decreased appetite)
Gastrointestinal · Rapid (shortly after ingestion).
Dysphagia (Difficulty swallowing)
Gastrointestinal · Immediate to rapid.
Disclaimer: This summary was compiled from multiple sources and is for informational use only. It is not a diagnosis or treatment plan. Toxicity can vary based on the substance, amount, plant part, and individual cat. If you think your cat may have been exposed to a toxic substance, contact a veterinarian right away.