species fungus family characterized brown cap measuring diameter stem long thick characteristic microscopic feature distinctive substance hyphae surface cap species known eastern united_states florida north rhode_island west mississippi eastern mexico mycorrhizal species associates oak beech trees edibility mushroom unknown taxonomy species described american mycologist collected type specimens red clay bank ditch alabama transferred species newly described genus genus moved species singer considered species opinion contested examining type specimens species considered distinct conclusion later monograph singer defined varieties collected florida description caps fruit body initially rounded shape later broadly convex eventually flattened age reach dimensions wide color ranges yellowish brown brown tobacco brown cap surface dry somewhat velvet like texture larger specimens surface divided small areas cracks cap margin tubes underside cap comprising hymenium dark brown brown angular circular pores lighter color tubes number pores millimeter tubes long surface depressed stem cap flesh white typically buff pinkish buff cut stipe typically measures thick young matures equal width color roughly cap tends slightly darker upper portion covered net like patterns ridges odor mushroom described variously distinctive taste indistinct slightly bitter edibility mushroom unknown variety similar appearance bitter flesh variety lighter colored cap distinctive apex stem fruit bodies produce spore print ranging color pinkish brown reddish brown spores measure somewhat shaped elliptical spores smooth surface depressed area spore attached spore walls thin pale yellow cream green solution potassium pale yellow melzer reagent blue blue stain appear hyaline pale yellow cap cuticle interwoven cellular arrangement hyphae roughly equal length arranged surface terminal end cells diameter roughly equal width length substance feature uncommon hyphae tubes diameter clamp connections absent hyphae basidia spore bearing cells club shaped measure pleurocystidia cystidia found inner surface tubes lance shaped narrowly enlarged middle somewhat shaped cheilocystidia cystidia outer edges tubes absent cystidia stem form stem usually club shaped measure similar species similar form unlike spores hyaline mass dark yellowish brown hyaline viewed light microscope odor apparent fresh dried specimens habitat distribution forms associations oaks fruit bodies usually found scattered groups sandy soil oaks mixed oak pine woods july september united_states mushroom distributed florida north rhode_island west mississippi collected cloud forest var state mexico occurrence mushroom occasional fairly common varieties rare known original collection locations florida
Tylopilus tabacinus