Philodendrons come in many varieties, but the most common type of leaf is heart shaped. Calcium oxalate is the primary poison in philodendrons, and all parts of the plant contain it. Other symptoms of philodendron poisoning include burning skin and upset stomach. Dieffenbachia and caladium—also popular house plants—contain similar toxins and cause comparable symptoms when chewed or eaten.

Bulbs from these plants resemble shallots and garlic, so it’s important to keep them separate from any foods. Eating these bulbs can cause nausea, vomiting, and diarrhea, and may be fatal if early symptoms are left untreated.

Several species of lily are poisonous to cats. If a cat eats these, they can cause kidney failure. Keep all lilies out of the reach of your cat. Get help right away from your veterinarian if you suspect your cat has been eating lilies.

The toxins in these plants can cause many problems in the animals that eat them. The problems include drooling, tearing, vomiting, diarrhea, trouble breathing, muscle weakness, and convulsions. If you suspect that your pet has eaten either of these plants, contact your veterinarian as soon as possible. These poisons can cause coma and death.

Eating the leaves, fruit, berries, or seeds of English ivy can cause belly pain, vomiting, and diarrhea.

This attractive and showy houseplant can cause irritation of the skin, mouth, and tongue. It can also cause throat swelling, trouble breathing, and upset stomach.

The entire castor bean plant is poisonous. The seeds are especially so. It may cause severe symptoms such as intense vomiting and bloody diarrhea, and may lead to death.