12 Common Plants That Are Deadly to Animals

CASTOR OIL PLANT
Ricinus communis, a common house and outdoor plant also known as castor bean, is the most poisonous plant in the world, according to Guinness World Re-cords. If ingested, its leaves and seeds can kill humans, cats, dogs, rabbits, and numerous other animals.
ELEPHANT’S EARS
If your pet bites into any part of Caladium hortulanum, also known as malanga and mother-in-law plant, they could end up with potentially deadly symptoms like difficulty breathing and swallowing. The houseplant is also the 4th most common exposure to plant poison for humans.
LILIES
Don’t bring this Easter bouquet around cats. Eating even small amounts of lilies can lead to death by kidney failure for felines. If your kitty does decide to nibble on a lily, get them to a vet pronto—there’s a 100% mortality rate for lily toxicity that is not treated within 18 hours.
DUMBCANE
While Dieffenbachia is rarely deadly, it can cause airways of pets and humans to swell up and prevent breathing. Avoid the plant’s sap: It causes irritation to skin and, if it comes into contact with eyes, damage to the cornea.
ROSARY PEA
Also called prayer bean, Buddhist rosary and Indian licorice, this invasive out-door plant houses abrin, one of the most powerful toxins on the planet. Just one “pea” can cause death. Watch out for rustic jewelry made with the seeds: A recall was issued for bracelets made with the peas in 2012.
LARKSPUR
The genus Delphinium (larkspur) covers approximately 300 species of peren-nial wildflowers.Alkaloids found in these plants can cause muscle tremors, res-piratory paralysis, cardiac failure, and death in both cats and dogs.
FOXGLOVE
Although an extract from foxglove is used in pharmaceuticals for heart failure patients, the plant in its raw for is extremely toxic for people, cats, and dogs. Just a half gram of a dried leaf, or 2 grams of a fresh leaf, can kill a human.
AUTUMN CROCUS
Also called “naked ladies” and “meadow saffron,”crocus contains a toxin that causes symptoms that resemble arsenic poisoning and can lead to death—bloody vomiting, bone marrow suppression, damage to multiple organs, and more.
SAGO PALM
A common ornamental tree in tropical climates, sago palm has a mortality rate of 50% to 75% when ingested, according to the American Society for the Prevention of Cruelty to Animals (ASPCA). Symptoms include black “tarry” feces, bruising, and liver failure.
BLACK LOCUST
The entire black locust tree is harmful, but the bark and shoots are the most toxic. It is estimated that 10% of black locust exposures result in death. Symptoms include nausea, depression, weakness, and kidney fail-ure.
YEW
Never play fetch with a yew branch—a dog could get a deadly dose of the tree’s leaves or bark just by holding a twig in its mouth. Worse, symptoms often go undetected until its too late.
OLEANDER
Oleander leaves can kill a human, and even take down a 1,500-pound cow, so yeah, needless to say it’s extremely toxic to pets. Symptoms in-clude diarrhea, muscle tremors, difficulty breathing, and cardiac failure.

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