I have this mushroom every year in my yard. It has expanded to many patches.
I always check it out but never considered it could be active? Or some type of Pan?
size: up to 6 inches tall.
Cap up to 4 inches wide when flattened and becomes wavy as matures
A tan, caramel color darkening when wet. Spores appear Black.
Grows in grass
It has jagged veil remnants on caps and visible area on stem, though i dont see the veil on stem
Near STL, midwest.
No bluing ever seen.