Amanita silvicola

Amanita silvicola, also known as the woodland amanita or Kauffman's forest amanita, is a species of Amanita. It forms a small to medium-sized white mushroom. The cap is 5–12 cm across and is pure white, convex to flat, often with an incurved margin. The cap is initially covered in a wooly outer veil that later leaves soft patchy remnants across its surface as it flattens. The stem is patched with volva remains, and is slightly larger at its base. The gills are white, close and crowded, and free, just reaching the stem, or to narrowly adnate. The flesh does not change colour when bruised or cut, but its cap may discolour with age. The species is found in coniferous woods the Pacific Northwest and California. Its edibility of is uncertain, but due to its close resemblance to two poisonous mushrooms in the genus, its consumption is strongly advised against. ...read more on Wikipedia.