Russula betularum is a small, very pale member of the Russula genus of mushrooms. It is usually white to very pale pink, inedible, and grows with birch trees. It is commonly known as the birch brittle

Russula sardonia, commonly known as the primrose brittlegill, is a mushroom of the genus Russula, which are commonly known as brittlegills. The fruiting body, or mushroom, is a reddish-purple, the col