Agaricales of the Hawaiian Islands 9. Five new white-spored species from native montane wet forests

Five new species of white-spored agarics are described from native montane wet forests in the Hawaiian Islands as follows: Callistosporium vinoso- brunneum, Marasmiellus hapuuarum, Marasmius koae, Mycena marasmielloides, Pleurocybella ohiae. Compre- hensive descriptions, illustrations and comparisons with phenetically similar species are provided. An itemization of the 24 known putatively endemic agarics described from this unique habitat is provid- ed.