Does anyone here know a lot about mushrooms?

About 6 years ago, the walls of the basement started leaking during the rain and the basement was slightly flooded (about 1/16") but, we had a couple of carpet samples on the floor near the work table that got soaked. A couple days later, I went down to get something and found one of these rugs (about 10" x 14") had what looked like 1" wide egg noodles on it and I couldn't, for the life of me, figure out where these noodles came from!! I went to clean them up only to find out that they were actually mushrooms growing on this rug sample!! They were completely flat and looked like whitish rectangular noodles that were slightly curled on one end! They were maybe 1/8" thick, about 2" long, if flattened out, and the stems they were growing on top of were only about half an inch tall! I doubt there was even a dozen of them. I didn't know what the hell they were or what to do with them so, I just took the entire sample out back to let it dry off in the sun! The next day,. they'd completely vanished!!

Does anyone here know a lot about mushrooms?
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