Some Agaricales from the Congo

Clitocybe cystidiosa, Neoclitocybe membranacea, N. lifotama, Hydropus xanthosarx, Xerocomus microsporus, Pulveroboletus paspali and the genus Hiatulopsis are described as new; the new combinations Clitocybe subtilis (Berk.) Sing. & Grinl., Hydropus funebris (Speg.) Sing., Hiatulopsis amara (Beeli) Sing. & Grinl. are proposed. A key to the species of Neoclitocybe and another to the sections Mycenoides and Irrorati of Hydropus are given. Chaetocalathus niduliformis, Gyrodon intermedins, Xerocomus alliaceus, and Boletellus obscurecoccineus are redescribed. Hiatulopsis forms axially symmetric spores on autobasidia.