These are coming up in my vegetable garden which has a straw mulch and composted manure base below.
tiny umbrellas need IDing please.
If it lasts for just one day, it may be related to Coprinopsis lagopus at some level. Google that scientific name and see what you think
Thanks Wannadanc--I believe you've nailed it. And sorry for the long delay.
When I first saw photo, looked like exquisite iron garden feature!