Pleated Inkcap
Taken at Baron's Haugh on 31st August 2018 using Panasonic Lumix LX5 in macro mode.
Fact File

Pleated Inkcap.
Species:
Order:
Family:
Local Names:
Parasola plicatilis.
Agaricales.
Psathyrellaceae.
Habitat:

Cap:

Stem:
Season
:
Edibility: 

On soil amongst grass in unimproved grassland, parkland, on lawns and along woodland edges (but not in woodland).
Up to  35 mm diameter. Ovoid at first, becoming convex or bell-shaped, then flat.
35 - 100 mm long.
Late Spring - Autumn.
Inedible. Some sources suggest that these mushrooms may contain psychoactive substances, in which case they should be treated as being toxic and potentially dangerous.

When picking any fungus for consumption, caution should be exercised at all times.