A worldwide community photographing and learning about wildlife
Looks like a washed out Chlorophyllum or Macrolepiota species to me.
Looks an awful lot like Piptoporus betulinus, but that species is supposedly (almost) exclusive to Birch trees.
Looks like it's turned itself inside out. Could be a Pleurotus species.
Strobilomyces species
http://www.mushroomexpert.com/strobilomy...
Likely a Lactarius species.