Lilies, including daylily, Easter lily, Japanese show lily, Oriental lily, Rubrum lily, Stargazer lily, Tiger lily, and Wood lily, are beautiful but extremely toxic to pets, especially cats, where even a small amount can be fatal.
Cyclamen, also known as sowbread, contains terpenoid saponins which are harmful to pets and can cause salivation, vomiting, diarrhea, heart rhythm abnormalities, seizures, and even death with larger ingestions.
Poison Hemlock, also known as poison parsley, spotted hemlock, winter fern, California fern, Nebraska fern, and deadly hemlock, contains toxic alkaloids causing agitation, tremors, drooling, diarrhea, paralysis, and death in pets.
Branching Ivy, including English Ivy, Glacier Ivy, Needlepoint Ivy, Sweetheart Ivy, and California Ivy, is toxic when ingested by pets, causing vomiting, abdominal pain, hypersalivation, and diarrhea, with foliage being more poisonous than berries.
Oleander, or rose-bay, contains toxic cardiac glycosides that can cause drooling, abdominal pain, diarrhea, colic, depression, and death in pets when ingested.
Jimsonweed, known as Datura stramonium, Devil’s Trumpet, thorn apple, Indian apple, black datura, jimsonweed, tolguacha, and Jamestown weed, is highly toxic to pets, causing symptoms such as dilated pupils, light sensitivity, restlessness
Tulips, part of the Liliaceae family, are toxic to pets, especially cats, with the highest concentration of toxins in the bulb, causing vomiting, depression, diarrhea, and hypersalivation when ingested.
Sago Palm, also known as Coontie Palm, Cardboard Palm, cycads, and zamias, contains cycasin which is toxic to pets, causing vomiting, dark tarry stools, increased thirst, hemorrhagic gastroenteritis, bruising, coagulopathy, liver damage, liver failure, and death when ingested.
Cocoa bean mulch contains theobromine and caffeine, making it poisonous to dogs and causing vomiting, diarrhea, increased heart rate, tremors, and sometimes death when ingested.
Kalanchoe, also known as mother-in-law-plant, devils backbone, chandelier plant, and mother of millions, is harmful to pets, causing vomiting, diarrhea, and sometimes an abnormal heart rhythm when ingested.