Russula brevipes
https://www.mushroomexpert.com/Russula_brevipes.html
Ecology: Mycorrhizal with a wide variety of trees, from conifers to hardwoods (see the discussion above); growing alone, scattered, or gregariously; common; summer and fall, or over winter in warm climates; fairly widely distributed in North America, at least as a species group. The illustrated and described collections are from Illinois, Québec, Pennsylvania, Michigan, California, and Colorado.
Cap: 6-20 cm; convex with a central depression and an inrolled margin when young, later broadly convex with a central depression and eventually shallowly vase-shaped, the margin remaining somewhat inrolled or straightening; dry; bald or suedelike; sometimes becoming cracked in age; white to whitish or creamy at first, developing brownish discolorations and sometimes becoming brownish to orangish brown overall with old age; the margin not lined; the skin fairly tightly adnate, not peeling easily.
Gills: Attached to the stem or running down it slightly; crowded or close; short-gills frequent; white at first, becoming creamy; sometimes spotting and discoloring brownish; sometimes bluish to blue, especially near the juncture with the stem.
Stem: 3-4 cm long; 1.5-3 cm thick; sturdy and solid; more or less equal; dry; bald; whitish; usually discoloring and bruising brown to brownish; basal mycelium white.
Flesh: White; sometimes discoloring brownish when sliced.
Odor and Taste: Odor not distinctive, faintly foul, or faintly fragrant; taste mild to slightly, moderately, or strongly acrid.
Chemical Reactions: KOH negative to faintly yellowish on cap surface. Iron salts negative on stem surface.
Spore Print: White to creamy.
Microscopic Features: Spores 7-10 x 5-7 m (but in some collections much smaller: 4-7 x 4-5 m); broadly ellipsoid to subglobose; ornamentation usually about 0.5 m high, as amyloid warts and occasional connectors that may be fairly isolated, or may form subreticulate patterns. Pleuro- and cheilocystidia 35-50 x 7.5-10 m; fusiform, cylindric, or subclavate, sometimes with one or more apical constrictions or knobs; thin-walled; hyaline. Pileipellis a cutis of hyaline to yellowish elements 2.5-5 m wide. Oleiferous hyphae present.
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