There are many plants that are harmful to cats. Below are some common plants that are harmful to cats:

Lilies: The pollen, leaves, and stems of lilies contain toxic substances that can cause poisoning in cats. Even if a cat only licks a little bit of lily pollen or the water from fresh flowers, it may still cause kidney damage and failure.
Ivy, spider plant, snake plant, maidenhair fern: The leaves and stems of these plants contain toxic substances that may cause digestive problems, vomiting, diarrhea, and oral irritation in cats if ingested.
Tulips and daffodils: The bulbs and flowers of these two plants contain toxic substances that are harmful to cats. If a cat accidentally ingests tulips or daffodils, it may experience symptoms such as vomiting, diarrhea, mouth ulcers, and poisoning.
Water lilies: The leaves, flowers and stems of water lilies contain toxic substances that may cause poisoning and gastrointestinal upset if cats come into contact with or ingest them.
Jasmine: Jasmine leaves and flowers contain toxic substances. Contact with or ingestion may cause digestive problems, vomiting, diarrhea, and oral irritation in cats.