species fungus family described scientifically species found europe japan north_america small umbrella shaped fruit bodies mushrooms fungus grow grass short lived usually collapsing age hours caps wide initially elliptical colored reddish brown depending age radial grooves extending center edge cap slender whitish stems long millimeters thick characterized presence thick walled cap cuticle characteristic addition relatively large ellipsoid spores distinguish similar species taxonomy species described french mycologist transferred molecular sort genera genera natural groups according database described named honor danish mycologist synonym based different type accepted authorities disagree suggesting forgotten species requires study type material taxa colleagues assigned plate containing original description believed sufficiently clear cut definition taxon determined species described publication placement somewhat controversial classified section grouping species characterized absence veil occasional presence cystidia stem cystidia cap surface dark like elements molecular studies confirmed inclusion clade relationship members group fully resolved limited sampling recent analysis suggests phylogenetic tree form crown species description fungus produces fruit bodies caps initially egg shaped margins inward cap expands conical eventually flat slightly depressed center ultimately reaching diameter fruit bodies change color depending state fruit bodies young fresh caps reddish brown especially wet mushroom matures outer edge cap turn color center remains reddish brown radial grooves extend center cap margins caps minute hairs visible hand lens gills free attachment stem width initially whitish turning brown eventually dark margin spores mature unlike mushrooms gills process gills dissolve black mass release spores whitish stem long thick hollow fragile young fruit bodies abundant thick walled hairs base stem typically disappear mushroom matures flesh thin fragile yellowish brownish lacks odor taste spore print brownish black edibility known certainty fruit bodies small spores ellipsoid central measure basidia spore bearing cells club shaped spored pleurocystidia cystidia gill face measure roughly elliptical shaped similarly shaped cheilocystidia found gill edge measure clamp connections present hyphae tissues cap cuticle comprises layer club shaped thin walled cells measuring interspersed long dark thick walled yellowish brown plentiful cap surface consist elongated hair like segment long attached surface base wide similar species characters serve help distinguish similar mushrooms grow including lack lack veil characterized long gold thick walled cap ellipsoid spores distinctly cap margin indicates allied species genus similar species include common widespread definitively separate cap habitat distribution saprobic species nutrients breaking organic matter simpler molecules fruit bodies grow singly groups large numbers road sides deciduous forests grassy areas mushrooms short lived usually lasting hours collapsing common europe north_america including hawaii recorded japan europe fruit bodies appear commonly spring summer months north_america fruiting common late summer autumn rains
Parasola auricoma