Russula occidentalis Singer.
Cap 6-13cm across; usually purplish with yellow-green center but very variable in color, sometimes with bluish-green shades at center and bluish purple at margin; viscid when wet; cuticle peels halfway. Gills sub-crowded; pale yellow, blackening at margin with age. Stem 50-80 x 5-25mm, firm; white, often grayish with age, bruising reddish then brown. Flesh firm; white, turning slowly reddish when cut, then gray to black. Odor none. Taste mild. Spores subglobose to ellipsoid, 8-10 x 7.5-9µ; ornamented with large protuberances, some connected by lines. Deposit cream (B). Habitat under fir and hemlock. Common. Found in the Washington Cascades area. Season September-November. Edible. (Never eat any mushroom until you are certain it is edible as many are poisonous and some are deadly poisonous)