Appearance
Cap: 4-15 cm; convex with a soft, inrolled margin at first; becoming flat or shallowly depressed; dry; finely velvety; whitish; consistently without concentric zones of color or texture.Gills: Attached to the stem or beginning to run down it; distant or nearly so; whitish, becoming yellowish; bruising and spotting slowly brownish.
Stem: 2-5 cm long; up to 3.5 cm thick; more or less equal; dry; finely velvety; without potholes; whitish; sometimes bruising brownish.
Flesh: White; changing to yellowish when sliced.
Milk: White; changing to yellow or yellowish (often slowly, and only very slightly) on exposure; staining the gills brownish to pinkish brown; staining white paper yellow.
Odor and Taste: Odor not distinctive; taste strongly acrid.
References:
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