Is Gloriosa Lily Poisonous? – Highly Toxic to Pets and People
Gloriosa lily is extremely toxic and potentially fatal to dogs, cats, horses, and humans. All parts of the plant contain colchicine, a powerful alkaloid with no antidote. Even a small amount of the tuber or seeds can cause multi-organ failure. Any suspected ingestion is a medical emergency. Do not wait for symptoms. Call poison control or emergency services immediately.
Why Gloriosa Lily Is So Dangerous
Gloriosa lily (Gloriosa superba) is one of the most toxic plants commonly sold as an ornamental. Unlike plants that cause mild irritation or stomach upset, gloriosa lily contains colchicine and related alkaloids that interfere with cell division throughout the body. This affects rapidly dividing cells first, including those lining the gut, the bone marrow, and the kidneys. There is no specific antidote. Treatment is supportive, and outcomes depend heavily on how quickly care is received.
The tubers (underground corms) are the most concentrated source of toxin. They resemble sweet potatoes, which has led to accidental human poisonings. The seeds, leaves, stems, and flowers also contain colchicine and are all dangerous.
Common Names
This plant is sold and listed under several names: gloriosa lily, glory lily, climbing lily, flame lily, and superb lily. All refer to the same species. If you see any of these names, treat the plant with the same caution.
Symptoms of Gloriosa Lily Poisoning
Dogs and cats: The ASPCA lists gloriosa lily as toxic to dogs, cats, and horses. Signs include bloody vomiting, diarrhea, shock, multi-organ damage, and bone marrow suppression. Symptoms can begin within a few hours and worsen significantly over 24 to 72 hours even after the plant has been removed, because colchicine continues to act on cells throughout the body.
Humans and children: The clinical picture in humans is similar. Initial symptoms are nausea, vomiting, abdominal pain, and diarrhea, often bloody. Within 24 to 72 hours, bone marrow suppression causes a drop in white blood cells and platelets, which dramatically increases infection risk and bleeding risk. Kidney failure, liver damage, and cardiac effects can follow. Fatalities have been documented in adults following ingestion of the tubers.
What to Do If Someone Ingests Gloriosa Lily
Do not wait to see whether symptoms appear. With colchicine-containing plants, the window for effective intervention is narrow, and by the time serious symptoms are obvious the damage is already advanced.
- Call 911 or your national emergency number immediately if you know or suspect ingestion of any part of the plant.
- Call poison control at 1-800-222-1222 (US) or your vet on the way to the hospital.
- Remove any remaining plant material from the mouth.
- Do not induce vomiting unless a medical professional instructs you to.
- Bring a sample of the plant or a clear photo to the emergency room or vet clinic. Identifying the specific plant determines the treatment approach.
- If the affected person or pet appears well immediately after ingestion, do not assume the danger has passed. Colchicine poisoning progresses over hours and days.
Safe Handling
Colchicine is absorbed through skin in sufficient contact. Wear disposable gloves when handling gloriosa lily in the garden. Wash hands thoroughly after any contact.
If you have pets or young children in your home or garden, consider whether growing this plant is worth the risk. The tubers in particular are a serious hazard if dug up by a dog or handled by a child who mistakes them for an edible root.
Do not grow gloriosa lily in areas where unsupervised children or pets can access it.
A Note on Confusion with Other Plants
Gloriosa lily is not a true lily (Lilium spp.) and is not in the same botanical family, but it is sold alongside true lilies in garden centers. True lilies are extremely toxic to cats; gloriosa lily is toxic to cats and much more broadly dangerous. If you find a climbing plant with flame-colored flowers with swept-back petals in your home or garden and are not certain what it is, treat it as potentially dangerous and keep animals and children away until you can confirm identification.
Frequently Asked Questions
Is gloriosa lily toxic to cats? Yes. The ASPCA lists gloriosa lily as toxic to cats, dogs, and horses. Colchicine poisoning in cats is potentially fatal. Any cat that has chewed any part of this plant should be seen by a vet immediately.
Are all parts of the gloriosa lily equally dangerous? The tubers contain the highest concentration of toxin, but the seeds, leaves, flowers, and stems are all toxic. No part of the plant is safe to ingest.
Can gloriosa lily be mistaken for food? Yes. The tubers resemble small sweet potatoes or yams. Human poisoning cases have involved people mistaking the tubers for edible roots. Never eat an unidentified tuber from a garden or wild area.
Is there an antidote for colchicine poisoning? No specific antidote exists. Treatment is supportive and intensive. This is why rapid medical attention is critical.
My dog ate a leaf but seems fine. Should I still call the vet? Yes. Call immediately. Colchicine poisoning does not always produce immediate severe symptoms. The plant continues to do damage internally while the animal appears outwardly normal. The initial period of apparent wellness is part of the clinical pattern, not a sign that all is well.