The radially arranged lamellae that hang from the undersurface of the cap in certain fungi of the Basidiomycotina. The gills, which are covered by the *hymenium
, are usually wedge shaped in longitudinal section and attached at the wider end of the wedge. This is believed to help prevent the spores becoming caught in the gills if the fruiting body is tilted slightly from the vertical. All gill-bearing fungi are traditionally placed in the family Agaricaceae, but this family is now sometimes split into a number of more homogeneous families.