Hygrocybe is a genus of agarics (gilled fungi) in the family Hygrophoraceae. Hygrophorus is a genus of agarics (gilled mushrooms) in the family Hygrophoraceae. A pileus is characteristic of agarics, boletes, some polypores, tooth fungi, and some ascomycetes. Omphalina is a genus of small agarics with white, nonamyloid, basidiospores and decurrent gills. Panaeolus is a genus of small, black-spored, saprotrophic agarics. Lentinula is a small genus of wood-inhabiting agarics. Chlorophyllum is a genus of large agarics similar in appearance to the true parasol mushroom. It is suspected to be the largest genus of agarics, containing over 2,000 widespread species. All known bioluminescent Agaricales are mushroom-forming, white-spored agarics that belong to four distinct evolutionary lineages. The fruiting bodies of "Agaricus augustus" are large and distinctive agarics. "Neolentinus lepideus" fruit bodies are tough, fleshy, agarics of variable size. These agarics lack clamp connections and do not form hymenial cystidia. Unlike most agarics, the caps of "Psathyrella species" easily break into triangular shaped pieces. The beefsteak fungus, a well-known bracket fungus, is actually a member of the agarics. Its relations are more close to the Agarics.