Identification: Seeds didn't come up but these did. ID ?

I put some seeds on mulchy soil in a terrarium, and these came up.

They are growing fast. They were completely closed this morning, when the picture with the quarter was taken.

More photos as they progress.

 

Latest picture 1AM
Earlier pictures were 10 AM yesterday (buttons) and 7 pm yesterday.

 

Pretty! They look like one of the formerly-known-as-Coprinus: Any big enough to check spore colour? Is the "bloom" on the cap surface more powdery or more crystalline?
-frog

 

Oh how wonderful! These are beautiful....a great sturdy looking variety of what I think also is a type of the 'former'? coprinus (what are they called now?) family...

 

This resembles Coprinellus micaceus, but at least belongs in Coprinus subsection micacei. Here is a key to around 100 Coprinus. http://www.mushroomexpert.com/coprinoid.html.

 

10 am this morning

 

4:30 this afternoon

 

DEFINATELY corpinus! WOW...those are spectacular! Lucky u! :o)

 

Last Pic 11:30 pm.

The much has gone very black all around the mushrooms. It's not spores because it was not on the stipes or the base.

A nice visit while it lasted....

 

Now a confirmed Coprinoid.

How come everyone else gets cool stuff growing with their plans? First the Leucocoprinus lilacinogranulosus, now this one ...