commonly known violet grey fungus family described mushroom distribution distributed eastern north_america korea fruit bodies fungus violet young fade chocolate brown color mature solid relatively large cap diameter white surface later turns pink white base stem like genus mushroom bitter taste number natural products identified fruit bodies including unique chemical derivatives fungal taxonomy species named american mycologist graduate students based specimens found near cornwall new_york decision use taxonomic rank wrote writer number forms varieties distinctive names ease develops habit interpreting slight variations definite taxonomic units word form instead variety making commitment actual status variable consideration information available collections mushroom young immature specimens authors unable obtain spores examination years found mature fruit bodies revealed color surface took time develop concluded differences physical characteristics differences spore size justify species distinct raised taxon species status later transferred taxon genus characterized spore print pink wine red brown specific coined latin lead colored purple mushroom commonly known violet grey description cap fruit body diameter initially convex shape centrally depressed broadly arched rounded margin young specimens hard firm cap finely velvet surface soon wears smooth color fruit body violet young ages dull violet gray eventually chocolate brown maturity flesh solid white change color cut bruised taste bitter odor distinctive mycologist calls mushroom beautiful bitter tubes underside cap deep millimeter depressed stem resulting attachment color surface initially white remains turning color maturity stem long thick enlarged base surface slightly smooth lower stem color buff light brown darker brown whitish base flesh stem white change color cut bruised microscopic characteristics collected deposit like spore print spores appear light pink flesh color viewed light microscope elliptical smooth walls dimensions basidia cellular structures produce spores club shaped measure cuticle cap smooth walled narrow brownish hyphae stained potassium contents tend form melzer reagent causes pigment form cystidia common tissue swollen base narrow apex measuring long thick clamp connections absent hyphae edibility like species fruit bodies recommended consumption bitter taste presence bitter meal bitter taste disappear cooking similar species species confused according source remarkable easily identified usa found conifers known new_york mississippi appearance similar distinguished paler colored cap older specimens purple edge cap spores described older literature confuse similar species young specimens cap unlike stems purple species known china characterized pale violet violet cap paler purple brown stem flesh color pale red pores addition different distribution distinguished smaller spores similar asian species known southwestern japan differs having cap fade color grayish brownish mature shorter spores microscopic characteristics habitat distribution ecology mycorrhizal species bulk fungus lives underground relationship roots tree species fruit bodies found growing singly scattered mid summer autumn deciduous forests beech oak trees occurs mixed hardwood forests preference sandy soil noted source north_america mushroom found east rocky_mountains ranging canada mexico species collected north_korea fruit bodies serve food source fungus feeding flies compounds derivatives isolated fruit bodies unique species additionally compounds identified mushrooms
Tylopilus plumbeoviolaceus