a gilled mushroom (agaricus species)

adnexed agaricaceae agaricales agaricomycetes agarics agaricus annulus basidiomycete basidiomycota body close convex details emarginate free fruiting fungus gilled gills hymenium lamella lamellae macro macroscopic mushroom naked partial pileus ring species spore spores stalk stem stipe stool substrate surface toad toadstool veil