I found this on a stump not far from the street. I do not know what kind of tree it was, many different trees grow in Dallas, TX. As you can see, it is white, tough, fibrous, pores on underside. Dry to the touch, no stem noted. I had to cut this from the stump with my hunting knife...with much difficulty! No spores. It is a young fungus, just appeared a few days ago. Note the grass growing from the mushroom. I have cultured the item. Thank you for the help!