Infundibulicybe geotropa, also known as the trooping funnel or monk's head, is a large funnel-shaped toadstool with a sturdy cream or buff colour.

French mycologist Pierre Bulliard initially described the trooping funnel as Agaricus geotropus in 1792, before Lucien Quélet renamed it Clitocybe geotropa (a name by which it was long known) in 1872.

[1] However, there are a number of similar white or pale mushrooms which are poisonous;[1] young specimens of Entoloma sinuatum can be distinguished by their sinuate gills and mealy smell.

[7] One fairy ring in Belfort, eastern France, has been reported at over half a mile in diameter and estimated at 800 years of age.

[8] Only young mushrooms are recommended for eating, as older ones lose their pleasant taste,[4] and the flesh becomes leathery in consistency.