They are characterized by producing fruit bodies (mushrooms) with umbonate caps and rough brown spores.

While typically shaped like a horse's hoof, it can also be more bracket-like with an umbonate attachment to the substrate.

The margin wavy sometimes with an acute papilla or mamilla, usually umbonate or with a depressed center.

Convex to obtusely campanulate with an incurved margin at first, rarely becoming plane, and often are umbonate or with a slight depression in the center.

Humidicutis mavis is a small mushroom with an umbonate cap 4-5 centimetres (1.6-2 in) in diameter, initially conical and later flattening to almost flat.

Psilocybe semilanceata is roughly similar in appearance to P. hispanica, but may distinguished by its mycenoid (Mycena-like) appearance and acute umbonate cap.

Occurs in subcoastal ranges of far south-eastern New South Wales and far eastern Victoria and has smaller, pedicellate buds in 7s, often not glaucous, but still with the warty, umbonate operculum typical of the group.

Carleton Rea named another variety amsegetes (meaning "field by the roadside"), which differs from the type variety by its "obsoletely umbonate" cap, its shorter and thicker stem, and its typical habitat of meadows and roadsides.

Phaeocollybia is defined as mushrooms, with a glutinous or moist or sometimes dry and innately scaly, conic, umbonate cap, a rooting, cartilaginous to wiry stipe, generally lacking a visible veil or cortina or with faint traces, and spores which are brown in deposit.