There is an article in The Daily Mail March 8th (UK) which warns about Lilies, that they are deadly for cats, and even if the cat just brushes against the flowers, gets pollen on its fur, then licks the fur, that can cause severe illness, and death. It affects their kidneys.
Many common lilies have this toxin:
TIGER LILIES
RUBRUM LILY
EASTER LILY
JAPANESE LILY
and probably other varieties.
I thought I'd post this warning. Take care kitties!