I picked it this evening beneath an oak, in France, Nantes :
I tried an image search with Google, and it seems I picked a finger of a dead hand :)
What is its name, and is it edible?
Biology Stack Exchange is a question and answer site for biology researchers, academics, and students. It only takes a minute to sign up.Sign up to join this community
The shape, colour and scales on the hat suggest something in the genus Coprinus.
Some species are edible, but it is not recommended to have them with wine. I would not advise you to eat them without further live identification by someone knowledgeable. Photo identification is not reliable.