Fungus (Amanita spissa)
The Death Cap and Destroying Angel are so poisonous that you only need to touch them to transfer the poison to your fingers, then you stop to have sandwiches for lunch and then, a few painful hours later, the lights go out. This is why, of course, unless you are an expert, fungi are best admired from a short distance and not in the hand.
I like the comment in my book against Amanita excelsa (again very similar in appearance to A. spissa): "Said to be edible" - obviously the author has decided not to try it to find out for himself.
The Amanita family also includes 'A. muscaria', the familiar red capped Fly Agaric which is described as having a pleasant taste, but later in the text as being poisonous! It is certainly known to bring on hallucinations that give it the name of the 'Magic Mushroom'.
So, the Amanita family of fungi are an interesting group. They are quite common, especially in broad leaved woodlands, and have similarities in appearance that make them difficult to separate without dissecting them or looking at their spores under a microscope. Mycology is a tricky subject.