Agaricus silvicola (Vitt.) Sacc.

　シロモリノカサ

  Habitat: On ground of deciduous forest

This mushroom resembles to Agaricus arvensis(シロオオハラタケ）、but has smaller spore, the upper part of stem shows pink or dark brown especially when old. The ring is thinner compared to A. arvensis. Stem base is bulbous. Usually grows in wood land.