This paper presents a description of Marasmiellus inoderma, an edible species, collected in the wild and cultivated in Benin (West Africa) on waste material from Elaeis guineensis (oil palm). Data from specimens collected in Benin and Togo were compiled and compared with data available on a number of closely related taxa. Illustrations of macroscopy and microscopy are given, as well as information on its ecology and a low-tech method for cultivation.