Common flowers that are poisonous to cats include lilies, which can cause kidney failure in cats. There is cuckoo, which can stimulate the cat's stomach. There are Christmas reds, whose sap is highly irritating to cats’ lips and eyes, and narcissus, whose entire plant is toxic.

Lily

Lilies are often grown in vases as cut flowers, but lilies are actually a nephrotoxic plant. Cat bites may cause severe kidney damage, such as tubular necrosis. It can usually be cured if treated within six hours, but if delayed, it can easily lead to death from kidney failure in cats.

Cuckoo

Cuckoo can irritate the cat's gastrointestinal tract, and its toxicity will seriously affect the central nervous system, causing nausea, vomiting and diarrhea, decreased blood pressure, and shortness of breath. In severe cases, it can lead to cardiovascular collapse, coma, and death.

Christmas Red

The Christmas red juice is highly irritating to the cat’s lips and eyes. If the cat bites the stems, leaves, or stamens, it will cause vomiting, diarrhea and other symptoms.

Darcissus

The entire narcissus plant is toxic, mainly concentrated in the bulb part. The white mucus contains narcissus and narcissine, and the sap in the flowers and leaves also contains it. Narcissus can cause gastrointestinal irritation to cats, causing symptoms such as vomiting, diarrhea, fever, abdominal pain, lethargy, and arrhythmia. In severe cases, it can lead to cramps, paralysis, and death.