Russula crassotunicata
Russula crassotunicata, commonly known as the rubbery-capped russula, is a North American fungus in the mushroom genus Russula. It was described by Rolf Singer in 1938 from a collection made in Washington state, United States.
The species is mostly white and often grows on rotted wood. It has been confirmed as a host of the parasitic fungus Dendrocollybia racemosa.