Is Rouge Plant Poisonous? – Toxicity Guide
Rouge plant (Rivina humilis) is poisonous to humans, dogs, and cats. The primary toxin is a ribosome-inactivating protein (RIP) found concentrated in the berries, with lower levels in leaves and stems. Ingestion causes gastrointestinal symptoms and, in severe cases, systemic effects.
What Is Rouge Plant?
Rouge plant goes by several names: pigeonberry, bloodberry, baby peppers, coralito, and dogblood. Its scientific name is Rivina humilis, and it belongs to the family Petiveriaceae, formerly grouped with Phytolaccaceae.
The plant is a small perennial herb, growing 0.4 to 2 meters tall. It produces glossy bright red berries measuring 2.5 to 5 millimeters, and white-to-pink flowers arranged in racemes. Native to the southern United States, Caribbean, and Central and tropical South America, it is commonly grown as ornamental groundcover. It tolerates shade and salt, making it popular in challenging garden spots.
The berries contain a red pigment called rivianin, chemically similar to the betanin found in beets. Historically, this pigment was used as a natural dye. This dye use is worth knowing if you encounter the plant in craft or historical contexts, but it does not make the berries safe to eat.
Is Rouge Plant Poisonous?
Yes. Rouge plant is poisonous to humans, dogs, and cats.
The berries contain a ribosome-inactivating protein (RIP), which disrupts cellular protein synthesis. This is the same class of toxin found in plants related to pokeweed. Leaves and stems contain lower concentrations, while roots are the least studied but should be treated as toxic.
One notable detail: birds appear resistant to the toxin and eat the berries without apparent harm. Mammals, including humans and domestic pets, do not share this resistance.
Toxic Compounds
The primary toxic compound in rouge plant is a ribosome-inactivating protein (RIP). This type of protein inactivates ribosomes, the cellular structures responsible for protein synthesis, effectively shutting down cell function. The toxin is related to phytolaccatoxin found in plants within the pokeweed family.
Research has largely identified RIP as the main culprit, though some sources note the exact toxin is not yet fully characterized. RIP remains the leading hypothesis and is supported by multiple botanical and toxicology references.
Symptoms of Poisoning
Humans
Symptoms in humans typically begin with numbness of the mouth and lips, which is an early and distinctive sign. This is followed by nausea, vomiting, abdominal pain, and diarrhea, which may be bloody. In severe cases, organ failure can occur, and deaths, though rare, have been documented.
Dogs and Cats
Pets usually develop vomiting, abdominal pain, and diarrhea after ingesting rouge plant. Additional signs include lethargy and drooling. Severe cases can lead to dehydration from sustained vomiting and diarrhea, and organ effects have been reported.
What to Do If Ingested
If someone or a pet has eaten rouge plant:
- Remove any remaining plant material from the mouth.
- Do not induce vomiting unless a medical or veterinary professional directs you to do so.
- Contact your veterinarian for pets, or call poison control and seek emergency medical care for humans. In the US, the Poison Control number is 1-800-222-1222.
- Note the approximate amount ingested and the time of ingestion.
- Bring a plant sample or photo to the vet or clinic to help with identification.
Acting quickly matters. Even small amounts can cause significant illness.
Safe Handling
Rouge plant sap stains skin a deep red, similar to beet juice. When pruning or handling the plant, wear gloves. Wash your hands thoroughly after any contact.
Keep the plant out of reach of children and pets. Do not use the berries in food or in craft projects that involve children’s handling. Clippings should be disposed of securely, not left where wildlife can access them. If you grow rouge plant in a garden with pets, consider physical barriers around the plant.
Frequently Asked Questions
Is rouge plant toxic to dogs? Yes. Dogs that eat rouge plant berries or foliage can develop vomiting, diarrhea, lethargy, and drooling.
Is rouge plant toxic to cats? Yes. Cats experience the same symptoms as dogs: vomiting, abdominal pain, diarrhea, and lethargy.
Is rouge plant toxic to humans? Yes. The berries are the primary risk for humans, though leaves and stems also contain the toxin.
Are the berries deadly? Deaths are rare but have been documented in severe poisoning cases. Even small amounts can cause significant illness, so treat ingestion seriously.
Can birds eat rouge plant berries? Yes. Birds appear to be resistant to the toxin and eat the berries without apparent harm. Do not assume this resistance applies to mammals.
Is it safe to grow rouge plant in a garden with pets? Only if pets cannot physically reach the plant. Use fencing or other barriers to prevent access.