Tylopilus intermedius Smith & Thiers Cap 6-15cm across, broadly convex becoming almost flat, with an incurved margin that turns up in age; whitish when young, becoming buff then slowly pale tan, gradually staining brown where bruised; dry, uneven surface with a bloom, often wrinkled like parchment. Tubes 10-15mm deep, deeply depressed around stem or free; white becoming pinky-brown. Pores 1-2 per mm, round; white then dark pinky-brown. Stem 80-140 x 10-40mm, solid, enlarged toward the base; white, staining dingy yellow-brown where handled, white within, base whitish; practically smooth. Flesh thick, hard; white discoloring brown around larval tunnels. Odor mushroomy. Taste very bitter. Spores narrowly boat-shaped, smooth, 10-15 x 3-5µ. Deposit fawn. Habitat in groups under oak. Rare, but abundant during seasons of heavy rainfall. Found in northeastern North America as far west as Michigan. Season August-September. Not edible.