Lily of the Valley: contains a substance that causes cardiac arithmia, abdominal pain and diarrhea.
Narcissus: especially the bulb causes gastroenteritis.
Walnut: the hull contains toxic glucosides, it can cause even serious gastroenteritis.
Macadamia nut: hull and shell can cause gastroenteritis and diarrhea, even severe.
Oleander: deadly also for man, causes cardiac arrest, nausea, vomiting (for those who can - rabbits can not vomit), bloody diarrhea, stomatitis, convulsions, cramps, ataxia, arrhythmias, liver problems.
Hydrangea, all varieties: contain cyanogenic glycosides that cause depression, anorexia, diarrhea, increased heart rate, increased body temperature and, for those who can, vomiting (rabbits, remember, are unable to vomit).
Nettle: as for man, the dangerous parts are the stinging filaments. They cause mouth rubbing with legs, diarrhea, vomiting (for those who can - rabbits can not vomit), tremors and bradycardia.
Poppy: Like all opiates, poppies are dangerous plants for rabbits.
Potato and sweet potato: raw, cooked and even the plant itself, in all its parts is poisonous and harmful to rabbits.
Herbaceous peony: leaves and flowers are dangerous for rabbits.
Carolina Pepper: Causes convulsions, heart failure and ataxia.
Petunias: they are Solanaceae, therefore they contain steroidal glycoalkaloids (solanine, atropine, solanocapsine) that cause abdominal pain, hemorrhagic diarrhea, lethargy, abnormal salivation, severe gastric problems, slowing of the heartbeat and serious neurological changes.
Smell peas: the seeds, edible for humans, are harmful to rabbits.
Tomato: leaves and stems, the fruit is edible instead. Even the so-called "tree tomato" is very poisonous in all its parts, with the exception of the fruit: the green parts of both plants cause hypersalivation, loss of appetite, severe gastrointestinal disorders, diarrhea, depression of the Central Nervous System, confusion, behavioral changes, weakness, dilation of the pupil, slowing of the heartbeat.
Pothos: causes irritation to the oral mucous membranes with intense burning of the lips, tongue, excessive salivation, difficulty in swallowing and, for those who can, vomiting (rabbits can not vomit).
Primrose: leaves and stems are poisonous. Causes, if ingested, diarrhea and stomatitis, if touched, dermatitis and irritation.
Oak: the leaves are very rich in tannins and can cause kidney failure, acorns are too rich in carbohydrates.
Rhubarb: A very common plant, dangerous to eat for rabbits.
Buttercup: also called Pie' corvino, Sardonia or Lappio. The toxic part is the sap, which can cause dermatitis, stomatitis, vomiting (for those who can - rabbits can not vomit), diarrhea, abdominal pain and convulsions.
Ricino, Palma di Cristo: the dangerous part is the seeds. It gives symptoms similar to cyanide poisoning; it causes very strong abdominal pain, diarrhea with blood, very serious damage to the kidneys: 2-4 seeds are fatal for children and other domestic animals, 15 for adults; castor oil, once widely used, does not have the same danger as ingested seeds because the extraction deprives the oil of the toxic component.
Rhododendron: see Azalea.
Elderberry: the whole plant, if ingested, can cause abdominal pain and diarrhea.
Triphasised sansevieria or mother-in-law's tongue: low toxicity, causes irritation to the mucous membranes of the mouth and stomach, vomiting (rabbits cannot vomit) and diarrhea.
Scylla: The bulb may cause gastrointestinal symptoms.
Spatafil: Causes irritation to the oral mucous membranes with intense burning of the lips, tongue, excessive salivation, difficulty swallowing and, for those who can, vomiting (rabbits cannot vomit).
Strelizia: also called bird of paradise. Seeds, if ingested, can cause gastroenteric disturbances.
Surfinia: belongs to Solanaceae, therefore it causes abdominal pain, hemorrhagic diarrhea, lethargy, abnormal salivation, serious gastric problems, slowing of the heartbeat.
Tobacco: The plant is toxic to rabbits due to nicotine. It can cause gastroenteritis, muscle tremors, ataxia and paralysis, which can even lead to death.
Mistletoe: deadly, especially berries (for many birds it is edible, indeed, a delicacy).
Canadian vine, American vine: cause of dilation of the arteries. Not to be confused with the Mediterranean Grapevine, which is edible (even the leaves).
Yucca: causes depression, diarrhea, abnormal salivation, convulsions and, for those who can, vomiting (rabbits, remember, are unable to vomit).