 "Tylopilus" means "bumpy or swollen pileus", from the Greek "tylos" "bump" and "pilos" "hat".Molecular analysis indicates the genus, like other large genera within the Boletales, is polyphyletic.A lineage of "Tylopilus chromapes" (now "Harrya chromapes" and related species) has been shown to be only distantly related to other members of "Tylopilus".