Leucocoprinus

Leucocoprinus is a genus of fungi in the family Agaricaceae. The best-known member is the distinctive yellow mushroom Leucocoprinus birnbaumii, which is found in plant pots and greenhouses worldwide. The type species is Leucocoprinus cepistipes. The genus has a widespread distribution and contains over 80 recognised species, however many of these species are little researched with only a small number of Leucocoprinus species being common. The majority of the species in this genus are exclusive to tropical environments however numerous species have become a common sight in plant pots and greenhouses resulting in them becoming well known worldwide. No member of this genus is recommended for human consumption, with Leucocoprinus birnbaumii being potentially quite poisonous....read more on Wikipedia.