The image presents a detailed view of the underside of a pine tree trunk, featuring a resupinate polypore mushroom growing on its surface. The mushroom's white base gradually transitions to brown towards the edges and is characterized by its fan-shaped or shield-like appearance.
**Key Features:**
* **Mushroom Appearance:** The mushroom exhibits a white base with brown edges, resembling a fan-shaped or shield-like structure.
* **Growth Location:** It grows on the lower surface of a pine tree trunk that has fallen 3-5 years ago.
* **Location and Date:** The image was captured in Big Creek Scenic Area of Sam Houston National Forest near Shepherd, Texas, on December 21, 2021.
**Conclusion:**
The image provides a close-up view of the underside of a pine tree trunk, showcasing a resupinate polypore mushroom growing on its surface. The mushroom's distinctive appearance and growth location suggest that it is likely Heterobasidion annosum(?) based on the provided caption. – AI vision