The image depicts a close-up view of a fallen oak tree covered with various lichens and mosses. The primary subject is **Haematomma persoonii**, commonly referred to as Sunken Bloodspot Lichen, which features reddish-brown spots on its pale green-gray surface.
In addition to the lichen, there are other crustose lichens present on the tree. These lichens are characterized by their flat, crust-like growth habit and often display a range of colors, including shades of gray, brown, and green. The mosses in the image appear as small, delicate plants with feathery or hair-like structures.
The image was captured in December 2020 at Trailhead No. 6 in Sam Houston National Forest, Texas. – AI vision