Boletus vermiculosus Pk. Cap 5-10cm across, convex-flattened, deep brown to bay, reddish cinnamon, paler with age; subtomentose to deeply velvety, slightly tacky when wet. Tubes dull greenish yellow. Pores reddish brown, often very dark, bruising blue-black. Stem 40-80 x 10-25mm, equal, firm; surface a dull yellow covered overall with dark reddish-brown minute floccose squamules, bruising blue-black where handled. Flesh firm; yellow, then instantly blue when cut. Odor mild. Taste mild. Spores subfusiform, 10-13.5 x 4-5µ. Deposit olive-brown. Habitat in beech woods. Rather uncommon (although much misidentified). Found in northern and eastern North America. Season July-August. Edibility not known.