16571  This iconic toadstool is a large white @-@ gilled , white @-@ spotted , usually red mushroom , and is one of the most recognisable and widely encountered in popular culture . Several subspecies with differing cap colour have been recognised , including the brown regalis ( often considered a separate species ) , the yellow @-@ orange flavivolvata , guessowii , formosa , and the pinkish persicina . Genetic studies published in 2006 and 2008 show several sharply delineated clades that may represent separate species . 