Lactarius corrugis Pk.
Cap 4-13cm across, convex becoming depressed, sometimes with a distinctly wrinkled margin; dark reddish brown to yellowish brown, sometimes paler at the margin; dry and velvety. Gills adnate to subdecurrent, close, quite broad, some forking; white to pale yellowy or buff, brown when bruised. Stem 40-110 x 15-25mm, solid; paler than cap, gray-brown sometimes tinged red-brown; dry, velvety. Flesh firm; white staining brown. Latex white, unchanging, abundant, staining tissues brown when cut. Odor slight. Taste mild. Spores globose, amyloid, 9-13 x 9-13μ; ornamented with an almost complete reticulum, prominences 0.4-0.7µ, high. Deposit white. Habitat singly or in small groups on soil under hardwoods in deciduous, coniferous, or mixed woods. Found in eastern North America. Season July-October. Edible.(Never eat any mushroom until you are certain it is edible as many are poisonous and some are deadly poisonous.)