This is a medium to large fleshy agaric with brownish cap, pure white patches, white stem, ring, bulbous base with distinct margin.
shiny brown or grey-brown with a very finely striate margin, initially domed but tends to flatten as the fruitbody matures. Pure white remains of the universal veil are dotted, usually fairly evenly, over the cap surface. Gills
white, free, crowded. Stem
pure white with a hanging ring that is initially quite chunky (as shown on the left) but often becomes thin and floppy in more mature specimens, sometimes with a toothed edge.
on the First Nature Web site.
on the MushroomExpert.Com Web site.