species fungus family fruit bodies mushrooms conical brownish cap diameter atop slender stem long white partial veil leave ring stem american mycologist described species member genus known today transferred found pacific_northwest region united_states canada grows ground groups clusters trails forest roads coniferous woods single collection reported finland mushrooms contain psychedelic compounds relatively low concentrations mushroom species similar appearance distinguished subtle differences form fruit body microscopic characteristics taxonomy species described scientifically based specimens collected washington oregon type specimen collected near oregon november publication smith revised opinion considered species later thought slight differences taxonomic significance species addition closely related smith later taxon transferred authority classified species section grouping related species characterized having roughly ellipsoid usually thick walled spores lacking pleurocystidia specific epithet derived latin meaning film refers gelatinous cap mushroom commonly known description cap initially sharply cone shaped expands slightly time broadly bell shaped expands completely flat cap margin pressed stem initially short time partial veil fragments hanging margin caps mature specimens smooth sticky translucent radial reach dimensions diameter color ranges isabella dark yellow brown mushroom moist changes pinkish buff dry cap margin greenish gray cap cuticle thin gelatinous covering gills attachment cap narrow moderately broad closely spaced eventually separate stem young gills brown color lighter edges maturity covered dark spores stem long thick roughly equal width slightly enlarged base lower region stem brownish color silky hairs pressed stem upper region grayish lightly white flesh turns slightly bluish greenish injured application drop potassium solution cap flesh cause color change pale dark reddish brown drop stem produces intense color change spore print brown microscope spores appear dull purple brown ellipsoid somewhat egg shaped according singer original description measure later study specimens collected british_columbia canada instead reported larger spore size range spores basidia spore bearing cells spored hyaline translucent measure abundant cystidia form sterile band edges gills cheilocystidia cystidia smooth inflated enlarged middle tapered ends sharp tip measure cap cuticle layer roughly horizontal hyaline hyphae diameter similar species overall stature fruit bodies generally similar smith noted superficial resemblance based similarities nature cap cuticle coloring stem base covered silky fibers distinguished presence partial veil firm gills smaller fruit bodies frequently mistaken widespread distinguished larger spores conical cap similar species microscope needed reliably distinguish species found new_york michigan north canada longer spores general resemblance species found northern north_america europe habitat distribution fruit bodies grow groups clusters moss forest debris coniferous forests fungus prefers fruit disturbed areas trails abandoned forest roads commonly found known pacific_northwest region north_america collected california idaho oregon washington widely distributed british_columbia canada found northern europe single collection finland fungus fruits forest paths abandoned logging roads growing fruit bodies tend appear late summer early winter cool wet weather contains compounds recreational drug terms considers species relatively weak levels reported range dried mushroom measured according reports 1960s fungus produce fruit bodies cultivated laboratory
Psilocybe pelliculosa