LACTARIUS deceptivus is a large white to cream mushroom with an inrolled, cottony margin, and depressed center. The cap is convex becoming sunken to vase-shaped. It is dry, smooth, aging scaly, and stains brownish with yellowish areas. Gills are creamy-white, somewhat close and attached to slightly decurrent. The latex is white, voluminous and unchanging, but it stains the gills brown. Cap ‘hairs’ and stipe also bruise brownish. It is found under hemlock or oak in mixed woods. Look-a-likes include Lactarius piperatus (Lactifluus piperatus), which has extremely close gills, and Lactifluus vellereus (Lactarius vellerus), which lacks the cottony roll of tissue on the cap margin. This species is not considered edible due to it acrid taste and pungent odor.