These have been present on my allotment for the past month or so, I thought they were just stunted, de-hydrated mushrooms up until today when I had a closer look a look at them. They range from around 6-11mm in diameter and are easily overlooked so I was pleased to have given them a second glance.
I think they are Field Bird’s Nest fungi (Cyathus olla), judging by their size and trumpet shaped cups when mature. They have 3-5 eggs inside.
If anyone wants a look at them drop me a line – they’re at Skircoat Green allotments.