a big genus of rusty-spored agarics having a fleshy pileus and a continuous annulus. Over 120 species are reported by Saccardo. Some grow on the ground and some on decaying timber. P. squarrosa is common on rotting wood in European countries and the united states.
genus of gilled agarics of European countries and the united states having brown spores and an annulus; develops on open surface or rotting timber