Toxic to cats:
Avacado, fruit and pit
Black Eyed Susan
Easter Lily, Very Toxic
Lily of the Valley
Tomato Plant, green fruit, stems and leaves
Try to avoid planting any of these in your yard if your cat goes outside. Also keep the above houseplants out of your cats reach.
It will save you and your cat alot of problems!
Please see www.cfainc.org/atricles/plants for a more complete list.