Underside of mushrooms Pluteus longistriatus on ...

The image features three specimens of the mushroom species Pluteus longistriatus growing on a fallen oak log. The mushrooms are light brown to tan in color and have long white stems, with some displaying small black spots on their lower sides.

The gills of the mushrooms are decurrent (attached to the stem), extending down from the cap margin and running along the length of the stem. They are pale pink in color and densely packed, giving them a "fine, gridded" appearance when viewed at close range.

In the background, the fallen oak log is visible, with some dirt or debris scattered around it. The overall setting appears to be a forest floor, likely in a wooded area of Big Creek Scenic Area of Sam Houston National Forest. – AI vision