Tylopilus felleus (Fr.) Karst. syn Boletus felleus Fr. Gallenröhrling Bolet de fiel, Bolet amer, Bolet chicotin, Bitter Bolete. Cap 6–12cm, fulvous to snuff-brown, slightly downy at first, smooth with age. Stem 70–100 x 20–30 (60 at base) creamy ochre, lighter at apex, covered in a coarse snuff-brown network. Flesh soft, white to cream, clay-pink beneath cap cuticle. Taste very bitter, like bile, smell slightly unpleasant. Tubes slightly salmon or coral. Pores similarly coloured, bruising brownish. Spore print clay-pink to vinaceous. Spores subfusoid, 11–15´4–5m. Habitat coniferous and deciduous woodland. Season late summer to autumn. Occasional. Not edible due to very bitter taste. Distribution, America and Europe.