This paper argues against the etymology according to which the Croatian name of the mushroom Boletus edulis, was borrowed from Hungarian. It is demonstrated that Croatian vrganj cannot be derived neither from Hungarian vargánya (as suggested by Skok III:624), nor from Hung. úrgomba. While the former Hungarian word was actually borrowed from South Slavic, the derivation of Croat. vrganj from the latter is phonologically impossible. Therefore, we propose a new etymology which derives Croat. vrganj from *xvъrganjь, from the same root as Croat. hrga ‘lump, knot (on a tree)’. That root can also be the basis from which Croatian (dialectal) hrčak ‘morel, Morchella’ was derived.