Volvopluteus gloiocephalus ?

[BubikolRamios]

No striate margin on cap edge on top (checking amanitas without ring), hence I get to this. Gray, nowhere +/-pink to be found on gills, at least to my eyes.
Added extra interesting detail of stipe. Grassland.

[abeja]

It looks like it. If you’re not sure, take a spore print and check that the gills are free.
I see slightly tinted gills.
The pattern on the stipe appears when the gills press against it in very young, still-closed fruiting bodies.

[BubikolRamios]

Right. Brown via slightly red, but almost someone would have to tell me to look for red.
Thanks.