Rigidoporus ulmarius (Sow. ex Fr.) Imazeki syn. Fomes ulmarius (Sow. ex Fr.) Gill. 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.