An agaric (/ˈæɡərɪk, əˈɡærɪk/) is a type of fungal fruiting body characterized by the presence of a pileus (cap) that is clearly differentiated from the stipe (stalk), with lamellae (gills) on the underside of the pileus. It is a type of mushroom or (particularly if poisonous) toadstool, the diverse group of agarics being lumped together as gilled mushrooms.[1][2] "Agaric" can also refer to a basidiomycete species characterized by an agaric-type fruiting body.