Large fungus.

Large fungus.

Observation - Large fungus.. Description: A large fungus - it should be so easy to identify but I can't narrow it down! Cap about 16cm diameter. Centre of cap has a depression and is slightly slimy. Gills are decurrent and terminate part way down the stipe at the remnants of a ring. Stipe below

A large fungus - it should be so easy to identify but I can't narrow it down! Cap about 16cm diameter. Centre of cap has a depression and is slightly slimy. Gills are decurrent and terminate part way down the stipe at the remnants of a ring. Stipe below that point is streaked. A group of them were found on the grass in front of a house near woodland and Greenham Common.