Sarcodon scabrosum (Fr.) Karst. syn. Hydnum scabrosum Fr. Gallen-Stacheling Sarcodon écailleux, Bitter Tooth. Fruit body single or fusing with others. Cap 4–14cm across, flattened convex or centrally depressed, covered in down and smooth at first soon becoming cracked and scaly, background color dirty yellowish covered in cinnamon, rusty or purplish-brown scales. Stem 25–100 x 10–30mm, tapering towards the base, downy to fibrous-scaly, dark flesh-colour eventually concolorous with cap scales, grey-green, blue-green or blackish green below. Flesh grey-green in base of stem. Taste bitter and acrid, smell mealy. Spines 1–10mm long, yellowish-white eventually becoming purplish-brown. Spores brownish, tuberculate (5.5)6–7.5 x (3.5)4–5um. Habitat coniferous and deciduous woods. Season autumn. Rare. Not edible. Distribution, America and Europe.