 Some Tylopilus species have a superficial resemblance to T. alboater and might be confused with it , including T. atronicotianus , T. atratus , and T. griseocarneus . T. atratus produces smaller fruit bodies with caps up to 9 cm ( 3 @.@ 5 in ) in diameter , and its whitish flesh directly stains black without any intermediate reddish phase when injured . It is known from only from western New York state . The " false black velvet bolete " , T. atronicotianus , has a brownish cap that lacks the velvety texture of T. alboater , and has stems that are minutely velvety and almost black near the base . T. griseocarneus , found in the Atlantic and Gulf Coastal Plains of North America , is readily distinguished from T. alboater by the strong orange to red discoloration that results when cutting or damaging the flesh of a fresh specimen . Furthermore , T. griseocarneus lacks the whitish bloom present on young caps of T. alboater , and typically has a more prominently reticulated stem . Specimens of T. alboater that are paler than usual can be confused with T. ferrugineus , but the latter has yellow cystidia when mounted in KOH , while the cystidia of the former are brownish @-@ yellow under similar conditions . 
