Russula emetica

Russula emetica, commonly known as The Sickener, Emetic russula or Vomiting russula, is a basidiomycete mushroom of the genus Russula.

Description
The cap is a bright red, 3-10 cm wide, initially convex, then later flat, or depressed, sticky. The taste is sharp, but this mushroom should not be eaten since it is an emetic (it induces vomiting).The spore print is white, the gills narrowly spaced. The stipe is 4-10 cm long, 1-2 cm wide, cylindrical and white.

Distribution and habitat
Grows in coniferous and deciduous forest, where it (at least in Northwest Europe and the United States) is very common. Sitings in Australia refer to the similarly coloured Russula persanguinea.