Tylopilus tabacinus

The caps of the fruit body initially have a rounded shape, but later become broadly convex and eventually flattened in age; they reach dimensions of 4.5–17.5 cm (1.8–6.9 in) wide. The color ranges from yellowish brown to orangish brown to tobacco brown. The cap surface is dry with a somewhat velvet-like texture, although in larger specimens the surface is areolate (divided into small areas by cracks). The cap margin is even and wavy.

The tubes on the underside of the cap (comprising the hymenium) are dark brown to cinnamon-brown. The angular to circular pores are lighter in color than the tubes and number about 1–2 pores per millimeter, while the tubes are up to 1.4 cm (0.55 in) long. The pore surface is depressed around the stem. The cap flesh is white, but typically stains purplish buff or pinkish buff when cut. The stipe typically measures 4–16.5 cm (1.6–6.5 in) by 2.5–6 cm (1.0–2.4 in) thick. When young, it is bulbous, but matures to become more or less equal in width throughout. Its color is roughly the same as the cap, although it tends to be slightly darker in the upper portion, where it is reticulate (covered with a net-like patterns of ridges). The odor of the mushroom has been described variously as "not distinctive, fruity, fishy, or pungent", while the taste is indistinct to slightly bitter. The edibility of the mushroom is unknown. …

Tylopilus tabacinus forms ectomycorrhizal associations with oaks, and fruit bodies are usually found solitarily, scattered, or in groups on sandy soil under oaks or in mixed oak-pine woods from July to September. In the United States, the mushroom is distributed from Florida north to Rhode Island, and west to Mississippi. It has also been collected from a montane cloud forest of Mexican Beech (Fagus grandifolia var. mexicana) in the state of Hidalgo, Mexico. The occurrence of the mushroom is "occasional to fairly common". The varieties amarus and dubius are rare, known only from their original collection locations in Gainesville, Florida.