bird`s nest fungus cyathus stercoreus. bird`s nest fungus with ovoid peridioles that contain spores

agaricomycotina autumn basidiomycota beautiful beauty birds black bright brown close closeup color containing cup cyathus egg fall forest fungus macro mushroom mushrooms natural nature nest nidulariaceae old olla outdoors peridioles peridiols plant rotting saprobic saprobny season small spore spores stercoreus striatus summer texture ukraine