Fungus

[Beth Eastman]

I’ve had a few of these mushrooms around my cabin every summer, but this year they seem to be sprouting up everywhere.

 Can someone identify them for me?  They have caps that are more yellow than they appear in this photo but the caps get  browner as they age. They don’t have gills, just spongy pores that are also yellow, as you can see from the one I turned upside down for the photo.The stems are white and  very stiff.  I’d be grateful for your help on this. Cheers, Beth