Phellinus igniarius (L. ex Fr.) Quél. syn. Fomes igniarius (L. ex Fr.) Gill. Gemeiner Feuerschwamm Faux amadouvier, Tinder Box Fungus, Willow Bracket. Bracket 10–40cm across, 2–8cm wide, 5–20cm thick, hoof-shaped, very hard and woody; concentrically ridged, rusty brown when young later grey and finally black with the surface becoming cracked; margin obtuse, long-remaining rusty brown and velvety. Flesh rusty brown, hard. Taste sour or bitter, smell fungusy. Tubes 3–5mm long in each annual layer, rusty-brown. Pores 4–6 per mm, circular, rusty-cinnamon to maroon. Spores white, more or less globose, 4.5 x 6.5 x 4–5um. Setae thick-walled, very dark brown, fusoid with acute apex. Habitat parasitic on deciduous trees, especially willow, causing intensive white rot. Season sporulating from spring to late autumn, perennial. Uncommon. Not edible. Distribution, America and Europe.