Lactarius rimosellus is a small to medium convex brownish-red, slightly depressed cap becoming flat and then funnel-shaped with a cracked or areolate pellicle. Off-white gills are subdecurrent, narrow and sometimes forked near the stipe apex. Stem is concolorous with the cap, dry, subglabrous, tapered at the base and becomes hollow with maturity. Flesh is thin and off-white. Latex is white and unchanging. Spore print is cream. Under hardwoods, especially beech and oak in summer and early autumn. Uncommon. Odor is somewhat sweet to somewhat unpleasant. Inedible.