Extract from Wikipedia article: Spongipellis unicolor is a species of polypore fungus in the family Polyporaceae. It is a plant pathogen that affects oak trees. The fungal hyphae grow inside the tree, rotting the heartwood. The fruit bodies are initially whitish to buff in color before turning brownish in age. The pores on the underside of the cap are circular to angular. Spores are held in tubes and are ovoid to ellipsoid, with dimensions of 7–9 by 6–7 μm.
Wood decay fungus Spongipellis unicolor (Tyromyces unicolor, Polyporus obtusus)(?) at the base of a fallen oak on Lone Star Hiking Trail near Pole Creek in Sam Houston National Forest. Richards, Texas, August 5, 2020 Lone Star Hiking Trail, Montgomery, TX 77356, USA
Underside of wood decay fungus Spongipellis unicolor (Tyromyces unicolor, Polyporus obtusus)(?) on Lone Star Hiking Trail near Pole Creek in Sam Houston National Forest. Richards, Texas, August 5, 2020 Lone Star Hiking Trail, Montgomery, TX 77356, USA
Large pores of wood decay fungus Spongipellis unicolor (Tyromyces unicolor, Polyporus obtusus)(?) on Lone Star Hiking Trail near Pole Creek in Sam Houston National Forest. Richards, Texas, August 5, 2020 Lone Star Hiking Trail, Montgomery, TX 77356, USA
Cross section of wood decay fungus Spongipellis unicolor (Tyromyces unicolor, Polyporus obtusus)(?) on Lone Star Hiking Trail near Pole Creek in Sam Houston National Forest. Richards, Texas, August 5, 2020 Lone Star Hiking Trail, Montgomery, TX 77356, USA