Tylopilus sordidus (Frost) Smith & Thiers Cap 3-12cm across, convex becoming nearly flat, with an even margin that sometimes turns up in age; olive-brown; dry, velvety, but quickly becoming cracked into patches. Tubes 1-2cm deep; graying to olive-gray becoming chocolate, bruising blue then brownish. Pores 1-2 per mm; graying to olive-gray, staining blue then chocolate. Stem 20-60 x 10-15mm, solid; surface similar color to cap with a copper blue zone at the top and whitish at the base, staining reddish or brownish when cut; brownish velvety bloom on the surface. Flesh thick, firm; yellowish white slowly staining pale bluish green then dingy pinkish gray. Odor mild but pungent and odd. Taste mild to slightly acidulous. Spores subellipsoid to inequilateral, smooth, 11-15 x 5-6.5µ. Deposit purple-brown to wood brown. Cheilocystidia clavate to vesiculose-pedicellate, up to 15µ thick. Habitat singly, in groups, or occasionally in clusters on sandy, open soil along streams and roads and in thin oak woods. Uncommon. Found in eastern North America and rarely in the Northwest. Season June-September. Not edible.