Lactifluus corrugis, the ‘Corrugated Milky’,has a dry, dark reddish-brown wrinked, corrugated cap which initially has an inrolled margin along with a shallow depression. In maturity it becomes flat to slightly funnel-shaped. Its gills are attached to somewhat decurrent and close. Initially they are a warm buff, but turn orange to brownish with maturity. The stipe is smooth, pruinose, firm and a much paler shape of the cap color. Flesh is off-white. Like Lactifluus volemus and Lactifluus luteolus, it produces copious white latex which is unchanging, but stains the gills brownish. Handling also discolors the mushroom brown. The latex is mild to taste. This mushroom emits a a less pronounced fish-like odor compared to its close relatives, L. volemus and L. luteolus, when old. It can be found under deciduous trees in summer and fall. It is considered by many to be a choice edible.