White to pale yellow mushroom

take more photos. Agrocybe praecox usually occurs in grassy areas while Agrocybe "dura" occurs in wood chip mulch. Agrocybe praecox has a partial veil and an annulus, sometimes, while A. dura does not. Other agrocybes with a veil and annulus include A. acericola, but there are others. Bet you can figure it out.

another possibility: Agrocybe acericola. It has a large, pendant annulus, as well as a rusty brown spore print. Pholiotas usually have a yellow-brown spore print. Pholiota veris is a slight mushroom whereas Agrocybe acericola is much more substantial, like an Agrocybe praecox. The Pholiota cap is hygrophanous - it lightens as it ages or dries. The Agrocybe cap is not hygrophanous. Which is it?

maybe it's brown spored - could it be something like Pholiota veris???