A shaggy ink cap, most of it having deliquesced into black sticky ink.
Species? I reckon it’s Coprinus comatus.
I’m a beginner at this; I’m just going by what I learn online.
The cap starts out being a tubular shape, enclosing and joined to the stem; then the lower edge frees and flares out, so the cap takes the shape of a tall bell; then that rim begins to liquefy and as this progresses, so the cap shrivels.
This self-digestion of the cap starting from its lower edge progressively frees further spores to be released.
Cycle-path, behind East End Park football ground, Dunfermline, Fife, Scotland.