panellus serotinus aka sarcomyxa serotina is a thick-gilled mushroom with an oyster shell and olive color.

nature leaf plant green wildlife tree autumn wildflower branch produce grass forest woodland panellus serotinus aka sarcomyxa serotina thick-gilled mushroom oyster shell shape olive color agaric agaricales agarics autumn background basidiomycetes basidiomycota bodies body brown close close-up closeup comestible daylight daytime deserted detail details eatable edible food forest fruit fungi fungus gilled green group higher inedible late late oyster macro mushroom mushrooms mycology nature oysterling orange oysters panellus serotinus panus pleurotus serotina wood