Rigidoporus ulmarius (Sow. ex Fr.) Imazeki syn. Fomes ulmarius (Sow. ex Fr.)Gill., Polyporus ulmarius (Sowerby) Fr. Ulmenporling. Bracket 12–50cm across, 6–15cm wide, 4–8cm thick, bracket-shaped, hard and woody, surface knobbly; concentrically ridged, white to ochraceous becoming dirty-brown in older specimens. Tubes 1–5mm long in each layer, pinkish to orange when young, browning with age, each layer separated by a thin contrasting band of white flesh. Pores 5–8 per mm, red-orange fading to clay-pink or buff with age. Spores pale yellow, globose, 6–7.5um in diameter. Hyphal structure monomitic; generative hyphae lacking clamps. Habitat at the base of trunks of deciduous trees, usually elm. Season all year, perennial. Common. Not edible. Found In Europe. The last photograph is from Ted Green, thanks Ted.