Greater Celandine

For some reason I seem to have a lot of this growing wild at the back of my garden this year. It's actually quite a pretty little wild flower, but it is also poisonous. It is said to be a good cure for warts and when you break the stem or try to pull it up you get covered in a bright yellow sap which takes a lot of scrubbing to remove - I must remember to wear rubber gloves next time I try.