commonly known red species fungus family described scientifically japanese mycologist widely distributed eastern asia fungus produces medium sized mushrooms reddish orange caps wide stems tall cream ring cream yellowish stem ends roughly spherical base covered bright orange patches edibility established fungus suspected associated molecular studies confirmed mushroom classification subgenus genus closely related species taxonomy phylogeny naming species described scientifically japanese mycologist based collections japan designated japanese mushroom according online database proposed french mycologist synonym generic classified subgenus genus according systems proposed species included molecular phylogenetic analysis intended help clarify natural groups phylogenetic relationships genus branch cluster species including var results comparable published later phylogenetic analyses included larger specific epithet derived latin words red closely authority suggested red appropriate common description cap wide convex flattened slight dark red reddish orange paler orange yellowish margin cap surface densely covered red orange yellow remnants cap margin grooves extending radius partial veil remnants hanging cap margin flesh mushroom white yellow reddish immediately beneath cap cuticle white gills free attachment stem broad short gills extend fully cap edge stem typically range length length gills stem thick roughly cylindrical slightly larger upwards surface cream ring cream yellowish base stem roughly spherical wide upper covered red orange yellow remnants remains mature specimens ring upper stem ring persistent upper surface white lower surface having yellowish edge red orange produces white cream colored spore print spores spherical nearly typically measure meaning absorb stain melzer reagent basidia spore bearing cells hymenium club shaped spored rarely spored measure slender extensions tips attach spores long found bases basidia edibility mushroom known certainty reported cause symptoms mice increased levels blood decreased blood nitrogen changes reported mice injection fruit body extract include decreases activity reduced levels liver experiments values returned normal hours initial injection suggesting poisoning affect liver kidney performance similar species colleagues mention eastern north american species resembles slightly short grooves edge yellowish orange cap slightly larger spores yellow bases reported occurring thailand probably habitat distribution mushrooms grow groups ground species form mycorrhizal relationships trees mutually beneficial relationship hyphae fungus grow roots trees enabling fungus receive moisture protection tree tree greater access soil nutrients original japanese collections forests dominated japanese beech found growing near india forest plantations species occurs china northern india south_korea countries southeast_asia example thailand southern limit distribution extends southern
Amanita rubrovolvata