species fungus family described classified variously genera molecular reaffirmed species fungus found north_america europe mushrooms grow ground deciduous forests fruit bodies buff caps diameter held slender whitish stems tall species resemble distinguished differences appearance habit spore morphology taxonomy phylogeny species described swedish mycologist transferred species defunct genus synonymous couple years later segregated genus including species gills gills melt liquid included generic transfer later changed mind taxonomic separation transferred species published new combination despite taxonomic species popularly known large scale phylogenetic analysis resulted splitting genus smaller genera authors confirmed validity generic placement specific epithet derived latin word study proposed sister closely related phylogenetic tree large clade consequently genus later study suggested results artifact taxon sampling species analyzed adequately represent genetic variation genera study demonstrated including descended common ancestor analysis closely related description cap fruit bodies initially egg shaped conical convex reaching deep narrow grooves reaching far center cap surface color pale buff center color loses intensity mushroom dry flesh whitish thin fragile barely auto gills initially buff turn grayish brown free attachment stem meaning small portion gill attached stem whitish slender equal width length slightly thicker base dimensions thick stem surface young specimens appearing coated minute layer fine white particles eventually leaving smooth silky surface odor taste fruit bodies distinctive gills species age barely fruit bodies tend fragile age spore print dark brown spores smooth ellipsoid shaped measure spore bearing cells basidia spored spores lie different levels mature different times cheilocystidia cystidia found gill edge roughly spherical broad shaped apex acute wide pleurocystidia cystidia found gill face absent species similar species resembles distinguished slightly larger fruit body somewhat gills tendency fruit smaller groups ground rotting wood smaller spores typically similar usually grows groups fallen branches broader spores measure usually grows small dense narrower spores typically produces smaller fruit bodies habitat distribution found north_america europe including germany poland ukraine including northern turkey pacific_northwest region united_states found oregon idaho fruit bodies grow rarely small forest litter deciduous forests especially ones dominated beech
Coprinellus impatiens