I have never seen these. They appeared about 4 days after a really heavy rain. This is under the bird feeder, so there is a lot of seed material in the soil.
It has a very faint mushroom smell when broken. The holes in the tops were what caught my eye,and when I carefully pulled one out f the ground, they are pretty solid, like the cap material on a mushroom. A slug was inside, eating. the body of the mushroom is a thin, spherical, wall, with no other parts but an opening at the top.
Any ideas? Is this even a mushroom?
This is how they look in the ground. The larger group was a multi chambered colony.
The same broken open, you can see the whitish interior, the thin walls, and the happy slug.
A collection of more pieces broken open to show interior and structure.
Edited by Skywatcher, 20 December 2016 - 09:17 PM.