Amanita phalloides

Amanite phalloïde - Oronge verte - Calice de la mort - Agaric bulbeux - Oronge ciguë - Lera verda picotada (Fr)

Death Cap (En) 

A very poisonous mushroom which, because it resembles many other edible types, is the most common cause of death amongst humans. The toxins within it are not destroyed by cooking and half a mushroom is all that is required to kill an adult human.