One for sorrow ... the Magpie Inkcap

Not a mushroom I come across often so it's always a treat when I do. It's the Magpie Inkcap (Coprinopsis picacea).

Not an edible, sadly, as it's poisonous. It does have one use though - like all of the inkcaps (hence the name) it deliquesces into a usable ink. The rim has already started to go.

Spotted in Beech and Yew woods behind Hughenden Manor, Buckinghamshire.