Hemileccinum impolitum is a basidiomycete fungus of the family Boletaceae, native to Europe. It is commonly referred to as the iodine bolete, because its fruit bodies tend to emit an iodine odour when cut, more detectable in the stem base or overripe specimens. Like other members of the family, H. impolitum has tubes and pores instead of gills in the hymenial surface of its fruit bodies. It is widely distributed in temperate and southern Europe, where it grows in mycorrhizal symbiosis with broad-leaved trees, particularly oak (Quercus).