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Cardboard Palm
Zamia furfuracea
Cardboard Palm (Zamia furfuracea) is a cycad plant popular in tropical landscaping and as an indoor ornamental, but it is extremely toxic to cats. Like all cycads, it contains cycasin — a methylazoxymethanol glycoside that gut bacteria convert into a potent liver toxin — as well as the neurotoxic amino acid beta-methylamino-L-alanine (BMAA). All parts are toxic, with the seeds containing the highest concentration. Ingestion of even a small amount can cause acute, life-threatening liver failure, and the prognosis is poor even with immediate treatment.
Important Notes
Symptoms: Vomiting, diarrhea (sometimes bloody), lethargy, jaundice (yellowing of eyes/gums/skin), abdominal pain, and neurological signs including seizures; liver failure develops within 24–72 hours.
Seeds are the most lethal part: One or two seeds can be fatal. Do not assume safety because seeds are hidden within the plant.
Action: Life-threatening emergency. Seek veterinary care immediately — every minute counts with cycasin toxicity.
Potentially Toxic Parts
Stem
Entire Plant
Seed
Leaf
Root
Possible Symptoms Reported in Cats
Icterus (Jaundice), Hepatic Necrosis, and Liver Failure
Hepatic · Progression to liver failure typically occurs within 48–72 hours.
Ataxia (wobbly gait), Tremors, Seizures, Paralysis, and Coma
Neurological · Often follows initial GI signs; depression and paralysis may progress as liver failure worsens.
Vomiting, Diarrhea (often bloody), and Hemorrhagic Gastritis
Gastrointestinal · Within 15 minutes to 4 hours of ingestion.
Abnormal Bruising, Petechiae (pinpoint hemorrhages), and Nosebleeds
Hematological · 48–72 hours (secondary to liver failure).
Hypoglycemia (Low Blood Sugar) and Increased Thirst/Urination (Polydipsia/Polyuria)
Hepatic · 48–72 hours (associated with liver failure).
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.