BEWARE of it, if it has "Lilium" in the Latin name.
Similarly, Gloriosa Lily or Flame Lily (Gloriosa sp.) are also very dangerous to have around cats.
Another plant to be cautious about handling and bringing inside your home is the Lily of the Valley (Convallaria majalis) as it is toxic to cats and poisonous to humans. Wash your hands after touching them.
Note that some other kinds of lilies are just fine to have around felines -- such as daylilies and waterliles.
See more about Lilies and Cats at:
Read more about Cat-Friendly Gardening here:
Here is a List of SAFE Plants for Cats:
Photo Source: FDA.gov
(This is an updated blog post from Spring 2014 and 2020)