Boletus griseus Frost apud Pk. Cap 5-15cm across, broadly convex; pale gray with darker fibrils, with age slightly ochraceous; dry, tomentose-felty, sometimes slightly fibrillose-scaly. Tubes pale grayish then brownish. Pores pallid to slightly brown where bruised. Stem 40-110x 10-30mm, equal to tapered below, solid; pallid above, yellow at base and then soon overall; with strong reticulum overall, concolorous with stem then slightly brown to blackish. Flesh pallid to greenish yellow below, yellow throughout with age, not changing color when bruised. Odor not distinctive. Taste not distinctive. Spores subfusiform, 9-12(13) x 3.5-4µ. Deposit deep olive-buff. Habitat scattered in open deciduous woodland, especially oak. Quite common. Found in northeastern North America. Season July-September. Edible.