Formerly Russula mairei, and commonly known as the beechwood sickener, the now re-classified fungus Russula nobilis is a basidiomycete mushroom of the genus Russula. This group of mushrooms are noted

In mycology, the pileus is the cap or cap-like part of a basidiocarp or ascocarp that supports a spore-bearing surface, the hymenium. The hymenium may consist of lamellae, tubes, or teeth, on the unde