Coprinopsis psychromorbidaCoprinopsis psychromorbida or cottony snow mold is a cause of snow mold. It is a basidiomycete, a psychrophile, and a plant pathogen.PhysiologyC. psychromorbida can thrive at least down to, optimally, and ceases growth at.HostsGrows as a snow mold in wheat, rye, and other grasses and can also cause post-harvest [losses (fruit)|storage rot]ting in apple and pear.