Ditto - a shot of one whole fruiting body by itself would be helpful. Possibly Pleurotus, Panellus or Hohenbuehlia. Was it growing on a stump, a standing tree or buried wood?
http://i22.photobucket.com/albums/b314/Ollyland/IMG_2739-3.jpg http://i22.photobucket.com/albums/b314/Ollyland/IMG_2759-3.jpg The wood was burried, or rather just the roots of a tree were left behind, I don't know what Kind of tree it was but the common ones around were cottonwood, elm and ash, I don't know if that's important or not. I couldn't see any stem they all looked like they were layered.
Paxillus would be a good guess but there is no visible dead wood? All examples I'm familiar with were on logs/stumps........ A member of the petaloides family was my guess as it can be visible even when wood isn't.....sometimes it attaches to underground unseen hosts.
Here, in south-easthern Finland Im used to see many species of the genus Paxillus attached to buried wood not seen on the surface of the soil ... Could not it be something near P. panuoides? Just guessing ... Kiitos, Sergi.
In two of the photos it sort of looks like the spore deposit (left on lower caps from upper caps) is white - Starsania, can you tell if it is white or buff coloured spore deposit?
To answer Frog. I'm pretty sure the undersides were a lighter tan color but they weren't white. To answer C.Wick I could see some remnants of the roots uncovered but I don't think the mushrooms were attached to the wood but I can't be sure. I went back to the spot where I found the mushroom thing and found that it had been mowed over.
