Lillies

Like Tiger lilies, and the other members of the Lilum genus, the ‘true lilies’ as they are known, are highly toxic to cats. So too are certain types of Day lilies. They are so toxic, that a nibble on one or two petals, a lap of spilled vase water, or the ingestion of a small amount of pollen (such as what happens when a cat grooms itself) can be enough to put a cat into expensive, debilitating, and potentially fatal acute kidney failure. preventivevet.com