Russula mordax Burlingham. Cap 5-13cm across, convex to slightly centrally depressed; deep madder-brown to blood-red brown; viscid when wet; cuticle separable halfway. Gills crowded, equal, many forking at base; yellowish. Stem 40-80 x 15-30mm, equal; white washed with red or reddish brown below, paler at apex. Flesh firm; white. Odor nil. Taste very acrid. Spores ovoid, 7-9.5 x 6-7.5µ; warts up to 0.8µ high, connected by fine partial reticulum. Deposit ochraceous (D-F). Habitat under fir. Found in Washington State. Season September-November. Not edible. Comment Singer suggests that this species may be the same as Russula badia Quél., but since Burlingham specifically disagreed with this interpretation, I choose her name instead