The following is a partial list of the dangerous types of plants. Please note this list is not all-inclusive. This list was compiled from the ASPCA National Animal Poison Control Center’s "Household Plant List" and reflects clinical signs associated with ingestion of the plant by dogs and cats.


Aloe (Aloe species)

· Vomiting, depression, tremors.

Amaryllis (Amaryllis species)

· Vomiting, depression, diarrhea, stomach pain, inappetence, tremors.

Azalea (Rhododendron species)

· Similar acting plant species = Andromeda Japonica, and Rhododendrons

· Vomiting, diarrhea, central nervous system collapse, cardiovascular collapse, coma, hypotension, weakness, death.

Autumn Crocus (Colchicum species)

· Bloody vomiting and diarrhea, shock, kidney failure, liver failure, bone marrow suppression.

Bittersweet, American (Solanum species)

· Plants that could cause similar problems include European Bittersweet, Deadly Nightshade

· Weakness, convulsions, vomiting, diarrhea, decrease in heart rate.

Buckeye (Aesculus species)

· Severe gastroenteritis, central nervous system depression or hyperexcitability, coma.

Castor Bean (Ricinus species )

· Usually a lag period of 48hours before signs appear

· Beans are highly toxic! Two to 4 beans can be lethal to adult humans!

· Severe gastroenteritis, oral pain and irritation, increase in thirst, kidney failure, convulsions, death.

Chinaberry Tree (Melia species)

· Fruit is the most toxic, but leaves, flowers, and bark can also be.

· Decreased heart rate, depression, weakness, seizures, shock, severe gastrointestinal upset.

Christmas Rose (Helleborus species)

· Abdominal pain, convulsions, delerium, vomiting and bloody diarrhea.

Cineraria (Senicio species)

· Plants that could cause similar problem include German Ivy and Ragwort

· Liver damage, depression, weakness, gastrointestinal upset.

Corn Plant (Dracaena species)

· Similar plants include: Baby Doll Ti, China Doll, Gold Plant Dracaena, Madagascar Dragon Tree, Ribbon Plant, Corn Stalk Plant, Florida Beauty, and Hawaiian Ti.

· Vomiting, occasionally with blood, depression, inappetence, incoordination, and weakness.

Cycads (Cycad species)

· Common name is Sago Palm

· Very toxic plant…a few seeds can cause problems.

· Liver failure, bloody gastroenteritis, blood clotting problems, death.

Daffodil (Narcissus species)

· Bulbs are the most toxic part.

· Severe gastrointestinal upset, convulsions, tremors, hypotension, weakness, cardiac arrhythmias.

English Ivy (Hedera species)

· Gastrointestinal upset, hyperactivity, breathing difficulties, coma,

muscular weakness, incoordination.

Foxglove (Digitalis species)

· Life threatening cardiac arrhythmias, cardiac failure, weakness, gastrointestinal upset.

Heavenly Bamboo (Nandina species)

· Discolored mucous membranes, slow heartrate,

respiratory difficulties, convulsions, respiratory failure, and death.

Holly (Ilex species)

· Intense vomiting and diarrhea, depression.

Hyacinth (Hyacinth species)

· Intense vomiting, diarrhea occasionally with blood,

depression, and tremors.

Hydrangea (Hydrangea species)

· Gastrointestinal disturbances, increased rate of breathing,

depression, and increase in body temperature.

Iris (Iris Species)

· Abdominal pain, drooling, bloody diarrhea and vomiting.

Japanese Yew (Taxis species)

· Very TOXIC!

· Cardiac failure, sudden death, tremors, breathing difficulty.

Jerusalem Cherry (Solanum species)

· Gastrointestinal upset, possible stomach ulceration, seizures, central nervous system and respiratory depression.

Lily of the Valley (Convalaria species)

· Incoordination, vomiting, cardiac arrhythmias

Marijuana (Cannabis species)

· Prolonged depression, respiratory depression, incoordination, coma.


· ALWAYS assume that any ingested mushroom is highly toxic until that mushroom is identified by a mycologist.

Toxic and non toxic mushrooms grow can grow in same area.

Mistletoe (Monstera species)

· Gastrointestinal upset, cardiovascular collapse, breathing difficulties, hallucinogenic behavior.

Morning glory (Ipomoea species)

· Incoordination, hallucinogenic behavior, stomach upset.

Nightshade (Solanum species)

· Inappetence, severe gastrointestinal upset, drowsiness, depression, weakness, decrease in heart rate.

Oleander (Nerium species)

· Highly toxic!

· Contains cardiac glycosides.

· Cardiovascular abnormalities, decreased body temperature, abnormal pulse rate, gastric upset, and death.

Precatory Bean (Abrus species)

· Beans are very toxic!

· Severe vomiting and diarrhea, increase in body temperature, incoordination, inappetence, and death.

Rhubarb (Rheum species)

· Kidney damage

Tobacco (Nicotiana species)

· Can cause hyperexcitability, tremors, convulsions, increase in heart rate, death is due to respiratory depression.

Tomato Plant (Lycopersicon)

· Leaves and stems contain toxic priniciples

· Severe gastric upset, depression, weakness, decrease in heartrate.

Tulip (Tulip species)

· Intense vomiting, depression, diarrhea, drooling, and inappetence.

Yesterday, Today, Tomorrow (Brunfelsia species)

· Gastric upset, depression, weakness, decrease in heart rate.

Yew (Taxus species)

· Sudden death from cardiac failure, tremors, breathing difficulty.

Yucca (Yucca species)

· Vomiting, depression, diarrhea, hypersalivation, seizures.

Jill A. Richardson, DVM

Veterinary Poison Information Specialist

ASPCA National Animal Poison Control Center


June 15th, 1998