• Philodendron -- Many varieties of philodendrons are poisonous and can lead to kidney or organ failure. Symptoms of poisoning can include oral irritation, excessive drooling, vomiting, and difficulty in swallowing.
• Poinsettia -- A Christmas time favorite, this plant is a gastrointestinal toxin and can also produce dermatitis in animals.
• Rhododendron -- The leaves of this ornamental shrub are toxic. Symptoms of poisoning can include vomiting, diarrhea, hypersalivation, weakness, coma, hypotension, and CNS depression.
• Rhubarb -- Rhubarb leaves can lead to kidney or organ failure in animals.
• Rosary Pea -- This vine displaying pea-shaped pods can prove fatal if chewed.
• Umbrella Plant (Scheffelera) -- This leafy green plant, which is often kept as a houseplant, can lead to kidney or organ failure.
• Yew -- This tree with needle-like foliage can be fatal to most animals, resulting in sudden death from acute cardiac failure. Symptoms may include muscular tremors and seizures in dogs.

Other plants believed to cause potential toxic reactions in pets include the following: Aloe, American Bittersweet, Andromeda Japonica, Asian Lily, Asparagus Fern, Australian Nut, Branching Ivy, Buckeye, Buddhist Pine, Calla Lily, Charming Dieffenbachia, Chinese Evergreen, Clematis, Cordatum, Corn Plant, Cycads, Cyclamen, Devil's Ivy, Emerald Feather/Fern, Flamingo Plant, Florida Beauty, Fruit Salad Plant, Glacier Ivy, Gladiola, Glory Lily, Golden Dieffenbachia, Golden Pothos, Gold Dust Dracaena, Green Gold Nephthysis, Hahn's self branching English Ivy, Heavenly Bamboo, Hurricane Plant, Japanese Show Lily, Kalanchoe, Lace Fern, Lacy Tree, Macadamia Nut, Madagascar Dragon Tree, Marble Queen, Marijuana, Mauna Loa Peace Lily, Mexican Breadfruit, Mother-in-law, Needlepoint Ivy, Nephthytis, Onion, Orange Day Lilly, Panda, Peace Lily, Plumosa Fern, Precatory Bean, Queensland Nut, Red Emerald, Red Lily, Red-Margined Dracaena, Red Princess, Ribbon Plant, Rubrum Lily, Sago Palm, Satin Pothos, Spotted Dumb Cane, Stargazer Lily, Striped Dracaena, Sweetheart Ivy, Swiss Cheese Plant, Taro Vine, Tiger Lily, Tomato Plant, Tropic Snow Dumbcane, Tulip, Variable Dieffenbachia, Warneckei Dracaena, Wood Lily, Yucca.

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