All parts of the plants in the Liliaceae and Hemerocallis family are nephrotoxic to cats. This includes Easter lilies, day lilies, Asiatic lilies, Oriental lilies, Stargazer lilies, Rubrum lilies and Tiger lilies (this list isn't all inclusive, as there are plenty more kinds of lilies.) The exact toxin has not been isolated from the lily plant, so treatment is geared toward stabilizing the patient by minimizing further absorbtion and metabolism of the toxin.
Please do a Google search for "lilies and feline renal failure"
or Google pictues of the above mentioned flowers. This could save your kitty's life or the life of someone else's kitty!
Here are some links that discuss lily toxicosis in cats:http://kingstownecatclinic.com/Lily%20Toxicity.htmhttp://www.gungahlinvet.com.au/info.php?id=15http://www.associatedcontent.com/art...l_to_cats.htmlhttp://jvdi.org/cgi/reprint/12/6/566.pdf
Lilies are my most favorite flower in the world. I have a garden full of Stargazer lilies and many different Asiatic and Oriental lilies, as well as a huge selection of day lilies. When I take Cleo outside on her leash, we stay as far away from the lily garden as possible. After I work in the lily garden, I strip down to my undies in the garage and immediately throw my garden clothes in the washer. I also take a shower immediately before interacting with the cats. I'm totally paranoid (and for good reason!) about lily toxicosis. I already have two cats with CRF (chronic renal failure) and I certainly don't want to expose any of them to any part of a lily plant!