Leucoagaricus badhamii

About

Leucocoprinus badhamii is a species of fungus in the family Agaricaceae and genus Leucocoprinus. The flesh of this mushroom turns blood red when cut or bruised, hence its common name of blushing dapperling. These damaged areas may eventually turn brown or black and likewise the mushroom may discolour brown or black with age. All parts of the flesh display red staining aiding in identification.

Summary from Wikipedia