Pileus 4-8 mm Gills white, pileus black, campanulate P. orizabensis Gills and pileus blackish brown, flabelliform P. subbarbatus Pileus stipitate or dimidiate, not resupinate when young Pileus membranous, stipe tubular Marasmiellus Pileus 2-3mm Pileus 10mm or more in diameter Pileus light brown, glabrous M. juniperinus Pileus purple, tomentose M. purpureus Pileus pale to light ochraceous salmon, velvety M. 4658 Pileus fleshy tough* to coriaceous, stipe solid when present Panelulus Gills rather distant and broad Gills very crowded and narrow Pileus avellaneous Pileus white or yellowish Gills dichotomous, edges obtuse Gills not dichotomous, edges thin Stipe tomentose, distinct Stipe glabrous, usually only a tubercle Stipe central to slightly eccentric, pileus regular Stipe tubular, slender with cartilaginous cortex Pileus somewhat gelified, stipe horny Heliomyces Gills few, distant Terrestrial; gills decurrent Growing on wood Pileus white or pale, not darkening on drying Pileus less than 1cm; gills decurrent Pileus 1-2cm.; gills adnate Pileus some shade of avellaneous or pale bay or becoming so on drying Pileus 2cm. or less Pileus 3-6 cm. Pileus deeply umbilicate to infundibuliform H. subspodoides 72% Pileus plane or slightly depressed Pileus plaе or tinged yellow when dry Pileus latericious when dry Gills numerous, crowded, growing on wood Hymenophore solitary Hymenophores cespitose Pileus umbilicate, gills interveined H. multifolius Pileus umbonate, gills not interveined H. foetens Pileus membranous to somewhat fleshy Pileus glabrous or nearly so Stipe compound or branched Pileus 6mm Pileus 2mm in diameter Surface white, bay on umbo Surface bay throughout Stipe simple, unbranched Polymarasmius P. multiceps P. submulticeps P. sarmentosus Marasmius